WinUI TabbedPage can have multiple tabs selected

[bmacombe]

Description

The problem reported in #6751 is still present in 9.0.110

Steps to Reproduce

I believe the reproduction in #6751 is still valid

Link to public reproduction project repository

No response

Version with bug

9.0.110 SR11

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

No response

Affected platforms

Windows

Affected platform versions

No response

Did you find any workaround?

No response

Relevant log output