My partner and I did experience the issue when we would get kicked constantly from multiplayer sessions (ticket lodged, one follow-up response, PC has good hardware - 3080ti etc, and good connection - 900Mbps/50Mbps).

Since patch 1.1.2 we have staggeringly low frame rate - though the host suffers not performance issue. We swapped who was hosting and the low frame rate only affects the one joining, not the host.

The game is unplayable for the one joining. Frame rates are like 1 -2  frames per second. No bottle necks observed in Task Manager. Game runs fine for host.

Hi Mojo

I'm sorry to hear that you and your partner are running into these issues while trying to play Grounded together. If you haven't already, can you please submit a support ticket? Once we have your ticket, we will work with you one on one to investigate and hopefully resolve the issue. 

https://support.obsidian.net/contact

Please include the following information:

1. Platform (Xbox Console, PC Game Pass, PC Steam).
2. Multiplayer or Single Player Game (if multiplayer, can you tell us how many players in total in the game, and their platforms if known)
3. Difficulty level
4. Description of issue.
5. Last thing you did in the game before the issue occurred, if applicable.

Thanks, and sorry for the frustration that this issue has caused!