It comes from coins being stuck to the top of the machine.
Had the same problem. When the person moved, I snatched his spot and all the coins were going down. That increased my perfomance.
It’s not just Coin River game but also Dragon’s Treasure game; my fps went from 60 to 8 from just that alone when I was in the same area as someone playing Dragon’s Treasure
Seems to be some sort of physics bug with the coins themselves? They also appear to flip on the wrong axis , could that be a contributing factor. Also after the “stuck” many hidden coins accumulate and starting the game causes client to ugh and this:
Gonna bump because this is still an issue in the arcade. Usually have an average of 80-100 fps in the arcade until people start using the coin pushers causing fps to drop as low as 15. Unsure if it’s the same issue or something completely different, it’s jarring whenever it happens I hope it gets addressed