'Why does Visual Studio think I'm on a different branch than my terminal and VS Code

I have a .NET 5 solution, using git for source control.

If I open it in Visual Studio 2019, the branch selector at the bottom right says foo
If I navigate to the root directory in a terminal window and check the current branch with git rev-parse --abbrev-ref HEAD, it says I'm on branch bar
If I open the root directory in VS Code, it also says I'm on branch bar
If I checkout another branch from my terminal like this: git checkout main, then both my terminal and VS Code say that my current branch is main, but VS2019 still says foo

What's going on?

visual-studio-2019

Solution 1:^[1]

Still not sure why this was happening, but deleting the .vs folder and restarting the solution/VS2019 seems to have fixed it.

Root Directory
- .git
- .gitignore
- README.md
- src
  + .vs    // deleted this and restarted VS2019
  + MySolution.sln

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Solution	Source
Solution 1	Michael Harris