The Sentinel ability called "Understanding" denominated by the picture of an unlocked lock crashes the game ONLY on the Eight Princes time period. So far, I have only tested this with Sima Ying and Sima Liang, and crashes on both their Sentinel generals.
A further explanation: When right clicking the Sentinel general that are in both Sima Ying and Liang's army, you have the ability to hover over abilities and attributes for them. When hovering over the ability called "Understanding", or the ability with the picture of an unlocked lock, it immediately crashes the game, and I cannot find a crash report for it. This does not happen at any other time period for the game, even with the new DLC Fates Divided.
This crash is happening without any mods running, and a completely fresh install (All files were uninstalled, then deleted off the computer, then reinstalled).
I have not found anyone else suffering from this issue as of yet.