My procedure blocks "forget" what they where supposed to be. ("Undefined" appears all over the entity list)

Ocassionally, my procedure blocks change what they where supposed to be by themselves. If selected that I wanted the mob to check for players nearby using "does entity exist of subtype player", when I opened the procedure, it would automatically change it self to the top of the list, and when I try to change it again, most entities on the list appear as undefined.

I have been ignoring this bug for a long time, but it has been happening with EVERYTHING.

Particles, entities, sounds... anything that has a dropdown list has a chance of getting reset every time I open the procedure.

Does anyone know how to fix this?

It happens in ANY workspace.