It's a huge exploit that ruins PvP for a lot. It's harming those trying hard to get NF, recluse and so on. If you can't fix it (been in the game for a while) then why not just remove countdown early before shadow keep. Most of the community don't enjoy countdown anyway, hence it being removed in shadow keep ....
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I've seen a Boi and his team match another notorious for this cheat. I would agree removing it from Endgame PvP until a fix is found might be a good idea. Less gametypes for a while but a lot less anger and heartbreak.