Video stream from BD is "Untranscoded" when imported into Encore

Hi!
I’ve been creating custom Blu-ray discs of a series of movies for future preservations. I ripped the M2TS files from the retail Blu-ray discs and imported them in Encore successfully to reauthor them.

However, in the case of only one particular movie, the M2TS video stream-only file shows as “Untranscoded” when imported…I tried a few things but nothing worked. I’m wondering why this specific file doesn’t seem to be BD-compliant when no other showed any problem.

Here is some info on the file itself.

Thanks for your help!