I called out 2 riflemen and moved the Pet Control Window. Then I dismissed the rifle men (or got them killed) and called out 2 again later. This time only the controls for one soldier was visible in the pet window and where the name "rifleman" and the action "Assist" is usually displayed, there were what appeared to be variable names displayed instead. (something_name and action or something - I apologize I didn't right down the exact words.) I could control one soldier with that Window - the 1st one called out - and the second soldier behaved as it was permanently on "assist". I dismissed and recalled several times with the same result.

Since seeing this error and logging off the game and back in, I have not been able to recreate it. I was able to recreate it multiple times in the original game session that it appeared but not since.