Filler as well as the media offline slates are stored in a separate internal media database for all the supported resolutions.
Sounds like a corrupt database file or black media file.
I'd try an uninstall. Clean out and re install.
Pat Horridge
Broadcast & Post Consultant, Trainer, Avid Certified Instructor
Free online Tutorials at VET digital media academy online
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pat@vet.co.uk