ComboBox ToggleButton layout breaks when used inside a DataGrid

### Description

When a ComboBox is placed inside a DataGrid cell, the layout of its ToggleButton becomes misaligned and does not render correctly.

### Reproduction Steps

there is a repo to reproduce

[WpfApp1.zip](https://github.com/user-attachments/files/24644358/WpfApp1.zip)

then do like that
https://github.com/user-attachments/assets/8b5da088-b63c-41ef-98ef-a66199c78c77

### Expected behavior

ToggleButton of the combobex should be in the right

### Actual behavior

ToggleButton of the combobex shown in the center of the combobox as show in the pictures and videos

### Regression?

_No response_

### Known Workarounds

_No response_

### Impact

_No response_

### Configuration

.Net 10
Windows 11
Any

### Other information

_No response_