I have multiple possessable pawns that should individually start swimming when overlapping the water volume from the water plugin, but for some reason when only one of them is in the water they both get the physics. I removed the physics change nodes to see if that was the problem, and it was. If I remove the physics nodes from only one BP, the other is still effected. Everything except the physics works normally for the non-submerged actor.
This is the same on both actors. Custom events are started by overlapping the water volume.