When click on 1 file, then holding shift and clicking on a different file to select a range of files (say, start with track 1, click on track 6 to select 2, 3, 4, 5 as well) ... Track, Title fields (at least, possibly others) remain as Track 1 info, and do not update to < keep > as has been standard.
Therefore, when wanting to edit, say Year in group of files, Title and Track info will become uniform with Track 1 data - problematic!