Parties are bugged

Everytime i invite someone it will say they joined then instantly it will say they left. Im also not getting onvites when trying too buy items, this is making trading a nightmare.

I’ve only tried trading twice. First time, we had to trade offer back and forth but eventually I think he accepted mine. Second time, we never spoke but neither of us I guess could accept and he left. Others on Reddit have reported similar issues. The trade accept/decline prompt appears but can’t or can’t easily be accepted.