Both in the Bay of Drowned Wishes lost sector (legend) and GM’s (Birthplace of the Vile and HyperNet Current), a Chill Clip Riptide was not stunning Overload Champions (Scorn and Taken). Whether it’s one bolt landing from long range, or multiple bolts landing from up close, I could not get them to stun properly. If it’s something about % of bolts in a shot that hit, I don’t know, but the description doesn’t read that way, and I’m certain I was in the top half of the mag with an Auto-Loading roll.
It has been inconsistent all season for me to. I noticed way back in the first few days that sometimes chill clip worked on overloads to stun them and sometimes it didn't. I haven't been able to pin down any sort of pattern though, it just sometimes does and sometimes doesn't work.