I'm aware SDK2 is no longer supported, but I wanted to bring this up as it breaks so many great worlds and seems like it may be a straightforward fix.
In SDK2 worlds, OnPlayerTriggerEnter is no longer working for players when entering a trigger collider. This breaks core functionality in many worlds.
Steps to reproduce: Enter the first room and turn the corner. The next area no longer turns on when entering the trigger collider.