I have taken two vids to illustrate what's happening in my machine. First one is a "clean" mission with AI and a few civies, surrounded by some ambient objects. Second video is a compialtion of two WIP missions, from which one runs on several mods. Also provided a repro mission.
First vid: https://www.youtube.com/watch?v=OSc4NHi5ZbI
Second vid: https://www.youtube.com/watch?v=bB7z2rdJb8U
Repro mission download: https://www.dropbox.com/s/mwccvwhs1n3wd2x/Showcase_Units_In_Combat.Stratis.rar?dl=0