Thanks to Florian for his everlasting will to improve this genius program.
Nevertheless a strange behaviour showed up with the latest update (v2.87a).
Some files won´t show length or bitrate, happens 2 of 4 in my case.
The reason must be some malformed streams (unknown or truncated), but the last version (v2.86) showed at least anything (even if it was wrong, e.g. cbr128 instead of cbr320).
Other programs recognize this as cbr320 files without problems:
see here https://i.imgur.com/VVaVnq6.png (sorry, cannot embed more than 2 images as new user)
Is there a way to improve this?