Hey Gambit, Grounded does not have Dedicated Servers so everything is NAT/Host Based for both ping and performance. I suggest letting the player the middle of everyone host the game and it should be a better experience. If this does not solve your problem please submit a ticket and we can look into this further.
Thanks!

Soonish ;)

Hey man, we have a fix for this coming in the next update :) Apologies for the wait on it

They fall under the map too quickly with collision off. So if we were to turn it off the amount of fixes is significantly high. Its not just like 1 bug its like 80, just currently not in the plan for development