Game crashed upon attempting to open a world.

After leaving the game idle at the title screen for ~45 mins the game crashed while trying to open a world. Not sure if the bug will reproduce as I do not have time to test, it may not be worth your time either.
steps.
1. create new world
2. play for a while
3. quit to title
4. leave game idle for a while (not sure if this is necessary)
5. reopen the world and the game crashes.

crash log is attached.