"Regroup Rhythms" removes slur

#196771: Regroup Rhythms deletes various elements, even more lost on undo was deemed fixed in 2018, but the issue I'm seeing in version 3.6.2 would seem to fall under its umbrella.

Running "Regroup Rhythms" (on this full measure, or on just the notes) doesn't change any rhythms but does remove the slur.

I appreciate Marc Sabatella's caveat (in https://musescore.org/en/node/206751) about this tool's inherent ambiguity in some situations, but surely in this case it is clear that the slur ought to be retained?