The 1.5.2 patch for Total War: THREE KINGDOMS is now live in beta access.

In order to opt in to the 1.5.2 patch beta:

Right-click on Total War: THREE KINGDOMS in your Steam library
Click Properties and click the Betas tab
In the drop-down menu, select the 5.2 option
Close the window and your build will automatically update to 1.5.2
The 1.5.2 patch addresses the following issues:

DIPLOMACY
Fixed issue where if an individual deal component was not the first part of a diplomacy deal it could lead to problems later – for example if a Mercenary Treaty wasn’t added first in a deal, that treaty might not complete correctly when its time limit runs out
Fixed issue where Liu Bei couldn’t annex Han Empire settlements in Mandate of Heaven
Fixed issue where asking subjects to end a feud as an Empire leader wasn’t working correctly – it would say they had agreed to make peace but they wouldn’t actually have made peace (this now no longer happens)
Fixed issue where the Coerce diplomatic action was missing for Lü Bu
Fixed remaining issues that meant a player couldn’t make peace when in an alliance war
Fixed issue where multiple alliance wars could be proposed at once
Fix for factions other than Bandits and those that aren’t under player control being able to sign mercenary treaties
Fixed issue where it was possible to issue ultimatums to factions you were already at war with
Fixed issue where it was possible to be at war with an alliance member if they issued you a mercenary contract and the target asked you to turn against the issuing faction
Fixed issue where if a mercenary faction asked another mercenary faction to be a mercenary for them, they wouldn’t be assigned a mission to attack a target
Fixed issue where the mercenary contract bar would stick around at the top of the screen if the mercenary lord made peace with the mercenary target
Fixed issue where, if you are kicked from an alliance/empire, you could wrongly have wars with both the alliance/empire and individual members of the alliance/empire
Fixed issue where consequential deals information was missing from some war event messages, for example declaring war on a faction with vassals will now once again show consequential wars with vassals in the event pop-up
CHARACTERS
Added more faction fondness for characters in A World Betrayed so that more legendary characters are happy to stay in their historical factions, for example:
Zhang Liao now has fondness for Lü Bu’s faction and a positive relationship with Lü Bu
Diaochan now has fondness for Lü Bu’s faction
Fixed issue where all court nobles were getting the governor salary by default, even if they were a family member. Now by default a character’s salary is 150 and then increased by titles and becoming governor (250 base) and minister (350 base). It is then further modified up or down by effect from tech tree etc. Family members will again have 0 salary
Halved AI salaries for court nobles, administrators and ministers
Increased time characters with unique art remain in the character pool after they leave a faction or their faction is destroyed, from 20 turns to 50 turns
Corrected Guo Si’s class display in battles, he is now consistently displayed as Wood
Changed Wu Jing’s personality type so his faction is less aggressive in campaign, giving more time for Sun Ce to complete his objectives
Cheng Pu now uses a corrected unit in records mode in the Rise of Warlords campaign so he now has a bodyguard. This fix will only apply to campaigns started after this patch
The following characters were spawning as the wrong element in the A World Betrayed campaign (which has now been fixed):
Han Fu
Liu Qi
Yuan Shang
Xu Rong
Yang Biao
Wei Huang
Xuan Fan
Fan Min
Added effects to the career trait for the following characters, and also set their starting traits as they were missing them:
Gao Dai
Zhu Fu
Xu Zhao
Wu Huan
Shi Yi
Shi Huang
Shi Wu
Zhang Yan’s and Zheng Jiang’s skill trees have been updated to include new Bandit skills
Fixed issue where Lady Mi and Tao Qian were missing Resilience
Fixed issue were Lady Bian’s armour gave Resolve instead of Authority
Fixed incorrect Chinese character used in the name of Yang Hong
Fixed issue where Yuan Huan was not gaining access to the Agricultural Development assignment his career trait should have given him
Fixed issue where any faction could get the Sun Quan/Zhang Zhao event if they had Zhang Zhao in their faction
Ma Xiu and Ma Tie’s starting ranks are now consistent in Rise of Warlords and A World Betrayed
Fixed issue where Luo Jun couldn’t unequip his starting armour or weapon
Fixed issue where Yan Baihu was missing a normal horse in his starting equipment which prevented him from unequipping his starting horse
Corrected Wang Dang’s background in the campaign selection screen to match his actual background in campaign
Corrected Lu Zhi’s spawn years so he cannot spawn in the A World Betrayed start date anymore
Changed Li Jue’s AI personality so it no longer references Dong Zhuo
Fixed issue where Zheng Jiang started with Archer Militia in her retinue which she can no longer recruit
Fix for characters added in A World Betrayed, or who got updated backgrounds in A World Betrayed, not supporting any political faction if they join Liu Hong’s faction in the Mandate campaign
Tao Qian’s wife Lady Gan is now in both Mandate of Heaven and Rise of Warlords
Fixed issue where Que Xuan leaves Tao Qian on turn 1 in Rise of Warlords
Fixed issue where Han Dang leaves Sun Jian on turn 1 in Mandate of Heaven on higher difficulties
Zhao Yun no longer starts with the Blue Blade in any campaign
Sun Ce death event in main campaign now waits until at least the year 200 to fire
Adjusted Guo Tu’s birth year so he appears of age in Yuan Shao’s court in the A World Betrayed campaign
CAMPAIGN
Removed warning of wrong game version in load game menu as the warning is incorrect
Fixed issue where Fervour effect bundles were not being removed after the Mandate War ended
Halved Prestige given by Lü Bu’s Personal Victories
Corrected issue where for each of the Bandit factions one of their unique units started with a cap but the other didn’t. Their unique units now have no cap, and do not gain a cap through any technologies. Other Bandit factions can still gain access to some of the other Bandit factions’ unique units via the Bandit Network
Moved many instances of modifiers to Family Estates income from effect bundles to other sources to correct issue where income could drop/increase on a save load
Reduced Prestige given by Bandit buildings to reduce pace of their campaign
Fixed issue where Liu Hong mission “A Legacy for the Han Dynasty is crafted by the Emperor” did not have a target building to construct
Replaced bonuses to silk and spice income in Bandit network with a bonus to commerce income
Fix for mission to take 95 regions not appearing correctly for Lü Bu once he has eliminated the other Emperors. Victory could still be achieved but the mission alerting players to this that was not appearing
Cao Cao no longer captures the Emperor if his faction is no longer around
Fix for Sun Ce’s Grandmaster Legacy of Wu set bonus not applying correctly to characters
Fixed dilemma “A Thief No More” to correctly spawn a character into Cao Cao’s faction
Fixed issue where Foreign Assignments were not available in the Eight Princes campaign
Eight Princes factions now have access to Zhanmajian Infantry and the Imperial units added in Mandate of Heaven
Spies are now available from the start for Bandit factions in the Rise of Warlords campaign
Zheng Jiang can again Demand Tribute from Han factions
Applied a fix to Sun Ce’s ambitions so that upon completion they always give at least 1 turn of boost to Reckless Luck
Fix for Lu Zhi’s “Art of War” not unlocking correctly
Fixed issues in multiplayer campaigns where if both players are Bandit factions and have Mercenary Contracts they could get each other’s rewards. They now get the correct rewards for their faction
Fixed issue where the Population icon and Fervour icon was not being shown on the province panel for major settlements
Fixed issue where completing missions for Sun Ce that granted characters before that character had come of age would not lead in them being given to him. Now if these missions are completed the character will join him once they are of age
Fixed issue where Lü Bu, on betraying Liu Bei, would sometimes get territory that did not belong to Liu Bei
Fixed issue where AI faction leaders could get titles
Fixed issue where heirs becoming faction leaders could keep their titles
Fixed issue where the “A Way Out” dilemma could occur multiple times if the campaign was saved and loaded
Reserves effect from Share the Spoils and Raiding stance is now being applied correctly
White Cranes Bandit tech melee evasion bonus increased from +3% to +5%
Fixed issue where it wasn’t possible to construct State Workshop in Jianye as one already technically existed in a slot that isn’t visible when it is conquered
Corrected issue with downgrades for Bandit resource buildings causing issues – these can now be converted properly by Han factions
Sun Ce’s flag now correctly changes when he forms a Kingdom
Corrected issue where many horse speeds had not been updated to reflect new unit speeds
Fixed issue where the new Bandit skills were not giving attribute points
Fixed issue where Prime Minister position was not appearing correctly for many factions in Mandate of Heaven campaign
Fixed issue where it was impossible to construct buildings in Jian’an when it was colonised in the Mandate of Heaven campaign
Fixed typo in population effect for People’s Compassion technology
Fixed incorrect spelling of Chen Gong and Cheng Gong in campaign selection screen
Fixed several instances of “a lot” being spelled as “alot”
Fixed issue where Sun Ce was not getting any event pop-ups when increasing faction rank
Fixed issue where Yan Baihu’s Family Estate income was too low in the Rise of Warlords campaign
Fixed issue where Sun Ce was not getting the same effects from port buildings as Sun Jian
Fixed issue where there were problems trying to upgrade the Taoist Temple chain (unique to Pengcheng commandery) as non-Yellow-Turban factions
Swapped Banditry income from Copper and Iron chains for Industry income for Bandits to give more chains with Industry income
Replaced references to Administrators in campaign selection, buildings and Bandit Network for Bandits with references to Underlings
Camp Crushers and Flying Riders now shown in Lü Bu’s campaign selection screen. These have replaced Xiliang Cavalry and Heavy Xiliang Cavalry because of the limited amount of space to display faction unique features
Fixed issue where Guo Jia’s Greatest Warrior objective could not be completed
Corrected several dilemmas that used a layout that meant the second option for them could not be seen
All characters in Lü Bu’s faction can now recruit Flying Riders when they are rank 2, instead of just Fire characters
Fix for Emperor effect bundle for Yan Baihu and Zhang Yan calling them “Empress”
Fixed issue where the public order bonus when Administrator effect from the Master of Writing title was not being applied correctly
Fixed issue where the new Bandit Villainy skill was not correctly unlocking the Reward the Villainous & Corrupt assignment
Cao Xing should no longer spawn in A World Betrayed until the event for Lü Bu
AUDIO
Fixed issue where the distance marching sounds were not being played in campaign battles

https://www.totalwar.com/blog/total-war-three-kingdoms-patch-1-5-3-hotfix/