Thanks for the offer, but in this situation I can’t do this, I’m afraid.
By now I have version 7.3.9. I did notice the saving still makes the settings revert (all sliding-checkboxes where to show the buttons are disabled), however, if I reload the page, the sliding-checkboxes I enabled then are enabled. I’m not sure if that was the case with 7.3.8 as well.
I would assume you don’t have that issue?
While your settings should still be able to save regardless of the undefined indexes,
I actually can’t. When I try, the toggles all revert back to off.