Slow pans on stills not exporting

I have a video with slow pans on still images, done by creating a SP&R filter and selecting one of the presets.

Sometimes, these pans disappear from the previews - Shotcut appears to forget about them. Sometimes they do show in previews.

When I export, they are not rendered. The images are static instead.

Have I missed something? Or is there a bug here?

Thanks.

Shotcut 21.03.21 on Windows 10.

Can you show a screenshot of the Shotcut window with a filter that is being “forgotten”? Maybe another users will see the reason why - like it could be disabled or have in/out points set.

You might have clicked on the check icon of the filter and disabled it sometimes.

(This is a pure guess, because you have given no screenshots or recording of the problem)