“I’ve done this hundreds of times and can do do it in my sleep at this point”
This speaks volumes. It’s really sad their system is so buggy that this is an actual thing.
I go back and forth between having 10,448 errors (in a brand new file), to 14… and it runs fine with the 14. When it has 10k+ I can’t even function. Intellisense just breaks and I have no idea what to type. 
Or what I do that makes them magically vanish…