However, behaves strangely. I select all trecks of an album → Plugins → Calculate BPM…
I see in the status that the BPM is calculated. When I click on the track again (directly after the calculation) to see the value, the field says: “different over 14 elements”. Although only one track is selected.
As soon as this value is once in the tag and I load the album back into it, it shows me a red “star” at the lived disk icon. No matter how many times I save it, it is no longer a perfect match.
If I clear the “BPM” field again and save, the album is marked as “perfect” again when I load it.
Do you have “Clean existing tags” enabled in options? If so this would do this, as it removes all tags from a file that are no explicitly set by Picard.
Disable this option or add “bpm” to the preserved tags.