The exported branch schematic is the same as before

[Fallensakura715]

Describe the bug
When exporting a branch schematic, after switching the layer to be exported, the previously exported schematic will still be exported. It will work normally after restarting NBS.

To Reproduce
Steps to reproduce the behavior:

1. Go to 'file'
2. Click on 'export branch schematic'
3. change the layer
4. See error : the file exported is the previously exported one

Expected behavior
the file exported is changed

Screenshots
none

Additional context
none