Toward the end of "The Corrupted" strike in the VG Ops playlist my character took critical damage & stopped being able to regen health & shields. Standing in a healing rift it would regen but at an incredibly reduced rate. However I seemed to also gain INSANE damage resistance. It felt as if my HP pool had increased by a significant amount. I was playing on arc Warlock with the Fallen Sunstar exotic helmet equipped, electrostatic mind & arc soul aspects equipped, spark of resistance, spark of discharge, spark of ions & spark of shock fragments equipped. No tonics were active & my artifact perks were: unstop pulse, AB shotgun, overload GL, rapid impacts, fell the revenant, killing breeze, trace evidence, retinal burn, concussive reload, hail the storm, conductive cosmic crystal & served cold. Happy to provide any further info as required. EDIT To be clear, since I feel like I might get more people saying it was the modifier. The only modifier active was "heavyweight" & my regen was normal for most of the strike. It stopped working between the first & second DPS phases in the boss room.