I’m having an issue where masked objects quickly become unstable.

What happens:

I select my clip in the timeline, use the object selection tool, create my mask & then assign it to opacity in the left side effects panel.

• Mask works normally at first
• After a few playthroughs it starts flickering
• Flickering gets worse
• Eventually the mask disappears completely

This is happening to most masked objects, not just one.

In one case, I tried deleting and re-adding masks before export:

• Worked temporarily but only 1 of 2 masks showed up in the final export

Additional context:

• Some clips are inside nested sequences
• Issue occurs in both playback and export
• Already tried clearing cache and re-rendering

I’ve attached a short clip showing the behavior.

❓ Questions:

1. Is this a known issue with masking (especially tracked/object masks)?
2. Can nesting cause masks to fail or disappear like this?
3. What is the most reliable workflow to prevent masks from breaking or missing in export?

Are these two different things? Or is "premiere" the new name and latest update to "premiere pro"? Thanks

https://preview.redd.it/f69t1ul1tdwg1.png?width=2290&format=png&auto=webp&s=7c9beaf385e798b47f55cb00d22b2d5b79054b28

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