Multiband Send: Change Routing For Deleted Send Track

OK, so I put a Multiband Send on Track 01, insert an S02 track. Choose S02 as a send for one of the three channels on the Multiband.
Now, if I delete the S02 send track itself, back on the Multiband where it used to be routed to S02 it now says ‘None’ and I can’t change it to S01.
Anyone else get this also?

The arrows next to “None” indeed do not work then.

Click on “None”, choose “S1” from the drop down will work though.