Map bug

Hello, I have a minecraft server on snapshot 1.16 20w12a, and as soon as I open a map I'm deco.

As soon as I try to reconnect I'm immediately deco.

Another player is obliged to /kill me so that I don't have the card in my hand anymore.

Is this a known bug in this snapshot, or is it just on my server?

Thank you for taking the time to read my request,

Have a nice day.