Hello, I wrote about something similar before in team battle. playstrategy.org/forum/playstrategy-feedback/problem-with-arena-pairings

Me and @Winter were the only 2 players, after the game we couldn't get paired again. Happened again with @Bram_Bekkers and @Vladimir.

playstrategy.org/tournament/R2Rtkb3a

These team battles sometimes have such low numbers and are infested with bugs.

Thanks for raising this issue. The team battle setup may have a different pairing system than a normal arena - we have not tested this as thoroughly as arena, but support the feature from Lichess out of the box.
It looks like the tournaments being held only have 1 member in each team, which means it would make more sense to just hold a standard arena tournament, where the pairings will work much better when there are only 2 players.
We have already raised a ticket to investigate the team battle pairings - however it is not the highest priority atm.

1