Had this same issue Feb 17. I had been knocked unconscious on 'Server A' after playing for too long, so just quit and went to dinner. Came back and couldnt log into 'Server B' I normally play on... kept getting "You are unconscious" or "Please wait....", but nothing happened. Respawn would give me the 30s countdown, but then just "Please wait...." Resolved it by logging back into Server A where I had originally gotten the KO. Once I did that, the respawn completed normally. Logged out and could get into any other server normally. Hope that helps someone else.