State Trigger not working ?

### Which version of the app?

WinUI 3 Gallery

### Description

When I try so set if set trigger value is true then call that setter property but I try many times but that do not work and I also try to different custom trigger but not anyone works.

### Screenshots

_No response_

### Windows version

Windows 11 24H2 (26052)

### Additional context

_No response_