Disable collision by defaultSuggestion
Under most circumstances, I would assume vanished players wouldn't want collision enabled, but currently it's enabled by default. Every time you reconnect, it re-enables itself. Not only that, but it does it every time you sleep and wake up (meaning when you die, use NTeleportation, etc.)

This is pretty inconvenient. Saving the status per player in a data file (as suggested in my other thread) would probably be the best solution, but at the very least it should be disabled by default, so we don't have to constantly type /collider just to keep from setting off traps, sensors, etc.
will be changed in the next update. Thanks for your input.