Every time I close Rider and reopen I get cannot resolve symbol errors

I cant repeat the problem, I have tried all the fixes available and it is still a problem.

So everything is great, the project builds it finds all my packages. It works without a problem. Then I close Rider, I reopen the next day. Then I get unable to resolve symbol errors throughout the project, it builds fine without errors, it also runs fine without errors. But essentially everything within the IDE becomes a text editor. Thought about just turning errors off and relying on debugging and googling manuals like I am trying to create an app with note pad, but sometimes it fixes itself as if by magic!

I invalidate the caches and restart and still doesnt fix the problem

I invalidate the caches, delete the .idea folder and still doesnt resolve the problem

I invalidate the caches, delete the .idea folder, go to the Library/caches folder and physically remove the Rider folder alltogether and restart, still doesnt solve the probelm. 

I restore Nuget packages and still doesnt solve the problem. 

It's like the solution forgets where the packages are but the compiler doesnt. Why are these two processes out of sync?