Board Game Arena

Hello,
can someone explain please why often I join a table in the lobby and then get told that I have quit the game?
Even when it matches my preferences.
I have 100% reputation,
sometimes the table host then joins my table so I don't think that they are booting me.
Its odd and often adds significantly to the wait time watching tables that I join come and go, which is frustrating and makes me go do something else quite often.

It's just the way the automatic matching system works. Sometimes players get shuffled around between not yet filled tables. It won't affect your reputation and it's not something someone is doing because they don't want you there. It just looks a bit odd.