@hiccup:
here is a screenshot of where I selected the appropriate field:
Ok, so it is just MusicBee's default tag for album duration. I wasn't sure perhaps you were using some virtual tag for this.
Just to be certain, you are aware that this is will be a static value? It won't be looking what is in your playing or upcoming list, and it won't progress?
MB calculates it by simply adding up the duration for all tracks that define the album of which the track belongs to.
If you set your main panel view to track details and display the 'album duration' column, you probably see the same 0:00 values for the problematic tracks?
What if you perform a rescan on such an album?
You could see if tag inspector shows something odd, or perhaps some cuesheet is messing things up.
Or maybe these files are corrupted somehow? Is it only mp3 files that show this problem?
You could run them through tools such as mp3diags or mp3val to check them for issues.
And then have MB rescan the files.