Oblio said (in the thread "2.44f may write tag data to the wrong files", but returned here to try to avoid "thread drift" between bug reports):
Yes - I can confirm that too.
In addition, selection state isn't preserved correctly when the filter is changed and the newly-selected set of files overlaps with the previously-selected set.
Ideally, this should select only the files that were previously highlighted AND match the new filter, although this might be difficult to use in practice because of the interactive nature of the new filtering system.
Regards,
gvm