I’ve experienced that before but I don’t have that problem with multiple unit movement. I am not exactly sure what I did to change it, I’ll try to find out but I figured I would share a screenshot of my physics and collisions settings for my capsule component. My best guess is I turned off “Can Character Step Up On”. My unit movement is still terrible.
Using detour crowds they seem to navigate to where I tell them well enough but if they encounter a group of units that are not moving they can get stuck on them for some reason but they never push them.