Limit orders cancelled

I had two $GME limit orders set up and confirmed set on Monday, at $600 and $800 per share for approx $25k per order. I received two push notifications today approximately 30mins before NYSE open telling me they’d been cancelled, with no explanation as to why, and they’ve disappeared and I’ve a couple of entries in my activity feed telling me they’ve been rejected.

Does anyone have any ideas as to why? My two triggered sells are still showing as active.