Hi. If you try to invite 4 people in total, even if some of them except the invite and join you still get the error of: You can't invite more than 4 people at once. I also invited one of my friends, and his internet was having issues apparently so playroom disconnected him and told him "too many connection attempts." This didn't alert me that he'd left the playroom. When he got back in, he couldn't accept my invite, but I couldn't re-invite him because "you can't invite more than 4 people at once."

I think this feature is for prevent spamming.
if you invite a player, then you can't re invite that player until specific time limit.
to resolve it, you can simply save your table and restore it.
ones you do that, you can able to inv that player again...

Ah thanks. I don't think saving is supported in Duck Race tables, but maybe it works if the game hasn't started yet. The spam prevention makes total sense, the main issue was just that it didn't detect his disconnect/reconnect which prevented him from accepting the invite that was sent in the first place