I'm facing this annoying issue where in XAML editor in VS is complaining that the type doesn't exist but it builds

I cannot get any intellisense for these types since it's showing error.

Controls from the labs repo just works fine

But if i start a brand new project, then XAML editor doesn't complain. Its only causing issue on one of my repo, i can't figure out what is wrong

I tried

• Clean build
• Delete obj and bin and build
• Restart visual studio
• Restart System
• Fresh clone my repo from github.
  The issue still persists.