Seeing the other excalibur thread, I remembered the bug I've noticed:
In the room you wait in, before you enter the spar queue, players are able to use their excalibur.
Then, as it told me to get ready to enter, a guy came up and hit me with it. I took damage, died before entering and lost the spar.
This happened quite a few times and it's quite annoying.
As far as I know, you only take damage, if you get hit while it tells you to get ready to enter.
Would be nice if you could fix that