In onMoveEvent() in MoveEvent.java, "vs.override" is checked for every player movement, even if the player is not moving to/from/in the void. I am not familiar enough with the code to know if this will work, so I don't feel comfortable creating a pull request, but my first glance suggestion is just swapping that line with the one below it (if pos < 0 etc).

This is extremely old code I have not uploaded an update recently. The plugin has been rewritten. I will upload the new code.

Ok new code has been uploaded.

Thank you