Hi @UtterlyInsane,
Welcome to Microsoft Q&A!
#1. According to your description, I tried to reproduce your issue. On my side, if I select another project to open, it will open correctly.
If you want to open a different project, you can also try clicking on File menu > Open > Project/Solution.
Besides, please open the Visual Studio Installer > More > Repair vs.
Then, launch your Visual Studio 2022 in Safe Mode (run devenv /SafeMode in Developer Command Prompt for VS 2022) and check that it works properly.
#2. Regarding this issue, you need to report it in Azure DevOps forum for help. Thanks for your understanding!
Sincerely,
Anna
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