I tested beta version 21.01.16. Problems are solved, but problem No.3 not in a clean way. The dropdown should automatically change its selection to it’s first (empty) line, as soon as manual changes are done. (fails to do this, already in last release). This should be the purpose of the empty first line. As consequence, the fix in this Beta-Version would be unnecessary. In a new opened filter however, the dropdown should be preset to show ‘default’, not to the first empty line (as it does now). As a consequence, the dropdown will always correctly reflect the situation. It might be worthwile to seek for any messy code in this context and clean up. The issue seems to relate to the dropdown generally (in all filters).