Microsoft had me create a memory dump and saw that the window had its style changed - which should not happen. They have a custom window shell which requires that the window style be set to none.
They asked me to review any extensions or utilities I have running. When I disabled Groupy2, then problem went away. I reinstalled Groupy2 v2.12 and everything was working fine again. So some change in v2.15 is causing the issue.
Yes, Visual Studio 2022 can be grouped. I sometimes have multiple instances grouped together.