Uther's devotion armor bonus bugged?


Hello, i remember that from a recent patch that the armor bonuses of a hero shouldn’t stack, but that only the highest is applied (thus some changes to increase some armor bonuses like Tassadar’s lvl 4 shield talent from +15 to +20),
but Uther’s does stack and we had to face a Garrosh with 60/70 armor at lvl 7 of a match, way before he gets the ability “Double up” which is at lvl 13…
Our team had no ways of killing him, ofc, we lost.