Masks are lost when used in styles

Describe the bug

When a module in a style has a mask, this mask is not correctly re-applied with the style.

Steps to reproduce

• Start with a freshly reset image.
• Add a circle mask to the exposure module.
• Increase the exposure. This only affects the masked area.
• Create a style using the "3 circles" icon just right of the button "compress history stack". Include the exposure module.
• Reset the image history.
• Apply the style.

Result:
The exposure module shows a mask-symbol, but the mask is fully opaque, so the exposure change is applied to the whole image.

Expected behavior

Darktable should apply the change only in the masked area.

Logfile | Screenshot | Screencast

No response

Commit

No response

Where did you obtain darktable from?

self compiled

darktable version

4.8.1, 8ded880839-dirty

What OS are you using?

Linux

What is the version of your OS?

Debian Bookworm

Describe your system?

I tested this on

• 4.8.1 from scoop on Windows 10
• 4.8.1 from Flathub on Debian Bookworm
• Current git 8ded880839-dirty on Debian Bookworm

Are you using OpenCL GPU in darktable?

No

If yes, what is the GPU card and driver?

No response

Please provide additional context if applicable. You can attach files too, but might need to rename to .txt or .zip

No response