Premiere Pro 26.3: Scaled landscape clips with portrait orientation metadata produce rainbow glitch bars and clip distortion in playback and export
- Working version: 26.2.2
- Broken version: 26.3
- Issue: Certain clips that were recorded landscape but interpreted/registered as vertical display correctly until scaled up. Once scaled, playback and export show distortion and flashing rainbow glitch bars.
- Rotation is not the trigger: rotating the clip does not cause it by itself. Scaling does.
- Scope: Happens in a brand-new test project and existing projects.
- Audio: Audio playback/export is unaffected.
- Confirmed workaround: Rolling back to 26.2.2 immediately resolves the issue with the same media and project.
- Tested: Media cache cleared after rollback.
- Hardware: Macbook M4 Max, OS version Tahoe 26.5.1
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