While updating the clusters Picard ignores selection changes. This can lead to actions being performed on unexpected files. E.g. if the user had selected "Unclustered files" when the started the clustering and while clustering is still running they select files or albums and save them the save action will still apply to the old selection.

The problem here is that we combine ignore_selection_changes with process_events_iter. So even though selection changes are ignored other events are still processed.