I noticed a weird bug on the spring field mission where if I make a new save and reload it, it causes the squad UI to bug out and basically duplicate squad members.

Sup. Just found your post, because was looking for something like this. In my case i played Tactics like year ago on steam, installed it today and loaded last save, saved again - duplicates, and if you load a save with duplicates the game crash. You can see in save-load section that save is corrupted if you see duplicates there. I think i’ve found out what was my problem. I’ve ran back to the start of the mission just to find out my humvee was like in infinite blown state. It somekinda bugged and you can never save this corrupted level. Then i’ve load a save of a previous mission and voila! No bugs or duplicates. Although i cant remember someone blowing up my car… Maybe a bug. So here you go, try to go to your car and check if it is okay. Maybe this will help! And sorry for my english.

My bad, it was a blown up Scouter found right after start of Jefferson. I’ve found it was blown up and glitched, just got there. Maybe it will help you…