I have experienced the same bug.
Unfortunately this comment doesn't allow me to upload my save file, but as you can see in the screenshot, it appears that the game is displaying Skrolk's remaining movement from the previous turn, instead of the movement he will have available at the start of his next turn.
I click enemy army when it has no stance and it shows their movement range.
But the range is not accurate anymore.
Was fine before 6.1.