@Lonelynorthwolf, hello! tell me, please, did anything clear up with this bug?
The same thing started happening to me today. Thralls stumble at every step during any attack movement, although this does not appear when they normally follow the character.
This phenomenon where slaves move strangely seems to occur when a slave whose setting is “Prioritize Ranged” has a close-range attack weapon and receives an attack command.
Please try setting the slave where this phenomenon occurs to “Prioritize Melee”.
The slave photographed in the video I posted earlier was set to “Prioritize Melee”, but for some reason it seems that the setting was automatically changed to “Prioritize Ranged”.
There was also an opinion that the phenomenon where the setting is automatically changed to “Prioritize Ranged” occurs only for archers.
I don’t know if the phenomenon where the settings are changed without permission still occurs, but if the slave’s movement becomes strange, it is a good idea to reset the settings again.