[2020] Glassmaker bug (?)

This weird thing just happened to me right now

I was in Hydron leveling up my stuff as usual and the glassmaker thing showed up, where the enemies become corrupted and etc. But this time I think a bug happened to me, The last corrupted enemie simply wasn't dying, me and my squad tried everything against the guy (It was a regular trooper) and he would simply not die, and before you ask we did in fact shoot the crystals that were supposed to weaken him and make him vulnerable.

I recored everything but im too lazy right now to upload it, if its not possible to help me thought this text I'll upload everything and the video will clarify it more. Cheers!