While trying to import 17 mp3 files via from Foobar2000 or from the directories mp3tag will only display 3 out of the 17 files. I have check to confirm it is not due to long file/folder names. I have also tried to fix VBR Header and rebuild mp3 but the issue is the same
You could check how many files get loaded when you look at the status bar (unfortunately, this is not quite visible in the screendump): this tells you how many files are loaded and how many are displayed. It could then be that you have set (unvoluntarily) a filter.