Unreliable "On item used"

For our Makecode based Minecraft tutorials, we generally use On Item Used to trigger code, instead of On Start. This has been more popular with the students. Unfortunately though we have hit up against a number of cases where this seems to no longer be be being watched by Makecode and all right click triggers with on item used are ignored. This seems in many cases to persist after a reboot as well.

one possibility is it exit abnormally when more than one trigger code are running. in this case, just slow the right-click to see if it’s ok.