thanks! I appreciate the feedback and the time you spent playing the game.
The PvP is async which means that when you submit a team on round 5, your team is stored in a database and other players will face your team during their round 5. So, all the teams you’re facing were created by other players, but those players are no longer controlling the team (and may not even be online).
The reason some teams were empty in the later rounds is because not enough teams have survived until that round and been saved to the database. This is a temporary issue that you’re helping to solve - your team on this rounds has now been stored and others will potentially encounter yours instead of an empty team.
I’ll take a look at the card getting stuck bug - really appreciate the report!