Metadata Keywords sometimes impossible to read/write

Hello,

when adding IPTC Core KeyWords to .mp4 or .mov files, I sometimes get an error message telling some files don't accept them. See screenshot.

I thing it's a Bridge bug:

• some minutes before, those files accepted to get the same keywords,
• issued files belong to the same group of files that work fine, produced the same minute with the same movie camera
• after using the following trick, those files work fine again.

My TEMPORARY SOLUTION:

1. create a Premiere project
2. import issued files in the project
3. use the "metadata" tab to add a dummy keyword in "Dublin Core > Keywords" field
4. close PPCC
5. go back to Bridge
6. Bridge works fine with files supposed not to be writable for metadata some seconds before

CONFIG:

• Adobe Bridge 11.1.1 or earlier
• OS = Apple Big Sur 11.4
• Computer: Mac mini M1 2020 - 16Go Ram

This issue is really borring! PLEASE, Adobe, try to fix it!