Bug report: enemies respawning after loading

Act 1, chapter 6. Unfortunately I don’t have a “before” screenshot, but upon loading my game roughly enemies I previously killed have respawned and my team has already spent most of their actions. I’m playing on Ironman mode on PC. You can see the Sniper Drone in the back that is downed. Basically everything in front of that enemy has respawned and will likely kill me on my next turn.