So yeah I was trying to avoid fighting an orb weaver so I ran into the pond.  The orb weaver was lining up a lunge to attack me but being in the water I assumed I was safe.  It attacked and landed in the water but it just vanished. I'm just curious to where the hell this thing went lol is it still in my game? is it dead? will it respawn? and will this also apply to other bugs that unintentionally land in water?

We do have this issue currently logged and investigating. We don't have a firm answer yet, but we hope to have the cause soon!