Multi-functions stop working after a while.
Multi-functions for some reason lose their target setting(see the images at the end of the issue). When this happens some of them or all of them stop working. I do not know exactly how to reproduce this bug, but it sometimes happens after I edit and play-test my dungeon. I also execute this command /kill @e[type=armor_stand] due to this bug #108 (closed). I think this also happened one time when I cut/pasted a multi-function, but I am not sure.
How it should be: 
How it is: 
Here is my functions.yml file: https://bin.bloom.host/oqiqetenon It contains weird strings like *id001, &id001, and so on. I don't know if this is the problem.
I am using the latest dev build.