Uruchom jako administrator vs 2019

I believe this information all lives in your .suo file and/or .user file. 
If they've become corrupt, VS will struggle, so it'll revert to the default.

Maybe try exiting VS, deleting the .suo and/or .user files, start VS 
and set it up how you want, restart it again and see if it remembered the 
settings.
Code with bulbul