The wpf form cannot be fixed again in the taskbar after being cancelled

### Description

The wpf form cannot be fixed again in the taskbar after being cancelled.

### Reproduction Steps

Create a winfrom or wpf program to fix the problem

### Expected behavior

It should be possible to unpin the action repeatedly in the taskbar

### Actual behavior

https://answers.microsoft.com/zh-hans/windows/forum/all/%E4%BB%BB%E5%8A%A1%E6%A0%8F%E5%8F%B3%E9%94%AE/816a8c56-b22f-4715-9160-6f363750697f

### Regression?

_No response_

### Known Workarounds

_No response_

### Impact

_No response_

### Configuration

_No response_

### Other information

_No response_