Old Film: Scratches filter does not work

What is your operating system?
Windows 10

What is your Shotcut version (see Help > About Shotcut)? Is it 32-bit?
22.06.23 and 22.09 beta

Can you repeat the problem? If so, what are the steps?
(Please be specific and use the names as seen in Shotcut, preferably English. Include a screenshot or screen recording if you can. Also, you can attach logs from either View > Application Log or right-click a job and choose View Log.)

The “Old Film: Scratches” filter does not work. The filter has no effect.

This bug appeared in version 22.03 when multi-threading was added to this filter along with most other Old Film filters. And the bug is only on Windows and not macOS or Linux.

This is fixed for the next version 22.09