Me and my wife are playing grounded 2 and we run multiplayer on series X. Both systems are fine, nats open, ports good and internet is optimal. We crash every 30mins or so it seems like, we freeze at times from lag and the enviroment seems glitchy. If the grass isn't bugging out, the bugs are literally stuck in rocks. Ive watched aphids fly into outer space at times too. Great game though, hope we get fixes soon and more content.

My husband and I are having the same issues.  Single player runs with no issues.  But if we get on multiplayer together, we are constantly getting kicked.