Golgoth18

Hello, I recently stumbled upon something i think is a bug, or at least i absolutely can't see any logic behind what's happening to me, for the first time after 15+ hours in hard difficulty i got one-shotted by a marauder goon wich kind of surprised me because usually they are not even half of a threat to me, and then i realised after the same thing happened quite a few time in a row with different type of enemies including marauder goon, scrap mechanical at least one of each type of marauder and even mantisaurs or raptidon that i was dying upon landing a hit with my melee weapon, at the exact moment my hit connects and the damage are applied I am dying, kind of like i was hitting my self or getting sort of countered but the fact that it would one shot me is what bothers me when even giant raptidon's charge attack only scratch a fourth of my health. I've tried different melee weapons but the issue is still there. Is it a bug ? If yes is there a known solution or a fix planned anyday ? Are others having the same issue or is it even a bug ? Thank you by advance.