Cheat or Bug?

Hey all, I wanted to reach out because I wasn't sure if this was a bug, or if these dudes cheated me some how.

Backdrop: CoS+8 my key, I joined a "BD Carry" group. Knew they'd be toxic, but if I said nothing I'd at least get my +8 done.

The issue: Dk pet pulls extra mobs, they blame it on me, they wipe, I Feign Death. Except once I FD all buttons go grey- meaning I can't move, get up or do any actions. It says I'm dead. These guys are howling at me, I'm bad, etc. So I /reload- no luck, no res button. I quickly relog, and I'm kicked. Depleted key.

So whatever about the key, and I don't really care how awful these people were. My question is are other players able to bug you out like this? Cuz if this is a bug on my end(never happened before), then whatever. If this is something like a cheat bug, then that's a bigger issue. Has anyone seen anything like this before?

Thanks