The selected tab is always set to the first selected tab when the associated screen experiences a major change (resolution changes, remote access or contrast f.ex.)
It is easy to replicate by opening the sandbox, selecting a tab other than the first one and the applying high contrast mode through windows:

I'll submit a pull request with a suggested solution shortly.
Environment
- Fluent.Ribbon v10.1.0
- Windows 11
- .NET Framework 8.0.403
The selected tab is always set to the first selected tab when the associated screen experiences a major change (resolution changes, remote access or contrast f.ex.)
It is easy to replicate by opening the sandbox, selecting a tab other than the first one and the applying high contrast mode through windows:

I'll submit a pull request with a suggested solution shortly.
Environment