Crash at the end of playback in MediaPlayerElement under specific screen resolution and scale

### Which version of the app?

WinUI 2 Gallery

### Description

**Resolution:** 3840 x 2160, Scale: 225% or 175%

**Detail:** If you play a long media streaming file in MediaPlayerElement at this two specific resolution and scale rate. At the end of playback, probably when thumb in the slider come to the edge of the slider. It'll instant crash the app.

Currently the only way to avoid this is to detect user's resolution and scale. Remove the slider manually to avoid the crash.

**WinUI version:** v2.8.7

### Screenshots

### Windows version

Windows 11 24H2 (26100)

### Additional context

_No response_

Start with MediaPlayerElement in the WinUI 2 Gallery and reproduce playback on Windows 11 at 3840 x 2160 with 175% or 225% scaling. Test a long streaming file until the slider reaches its edge; done means playback ends without crashing and the slider remains usable without resolution-specific removal.

Written by the indexing model from the issue text.