Why Redskull buff getting nullified in battlegrounds?

He was supposed to be nullify fateseal and stagger immune. But his armorup buff getting nullified in current bg meta.Anybody else facing same is as mine?
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What's next? A shock immune character is immune to shock from an opponent but not from a node?
If a champions immunity says; 'immune to shock effects from champions' yeah it wouldn't be immune to nodes.