Steps to repro:
1. Setup 10 command blocks to create 10 teams.
2. Wire all 10 Command blocks together and power them to create the 10 teams.
3. Power them again, duping the teams.
4. Use the admin command /scoreboards players list.
5. Observe.

Result: Local player is booted from server with the following error code:

internal exception io.netty.handler.codec.decoderexception java.lang.indexoutofboundsexception: readerIndex(1) + length(1) exceeds writerIndex(1): UnpooledHeapByteBuf(ridx:1,widx:1,cap:1)

Server spits the following message

Showing 1680 tracker players on the scoreboard

. I am the only player saved on the server.

Attempting to remove the teams within game does not do anything. I deleted player and stats data with no success.

Is there anyway to delete teams within the server files?
Thanks,
Beau Reynolds.