Playing with friend on this mod. There is a 33ms delay between each other. We get to Aquatic 3-1 and opened the shell weapon chest and desync occurs. He is hosting playing B-Skin Crystal while I am playing C-Skin YV. The desync has occurred every time my friend and I go to Aquatic 3-1.
It's definitely somehow caused by the player walking over the pit tiles, but I have no idea why. The main problem with the bug is I can't do any trial and error to fix it cause I personally don't get the desync with anyone I've tested with for some reason, though it definitely happens for certain people