Teams auto attendant holiday call flow problems

I have a holiday schedule applied to an auto attendant. That schedule contains all of our annual holidays.

In the auto attendant holiday call flow routing options, I have it play an audio file and I specify menu options to redirect to voicemail or to search by name.

What I want to do is just change the audio file that's played for the greeting to be appropriate for the holiday (we'll be closed for Christmas, New Year, etc.). But when I delete the current audio file and upload a new one, the Save option is greyed out. I thought perhaps it was just auto-saved, so go out to the list of auto attendants, then back into that attendant and check to see what audio file is listed. It's the one I just uploaded. Ok, cool. I refresh the browser tab and check again. Now it's the previous greeting. The only way I have found to save that new audio file, is to make some other change to the call flow (change Directory search option) which makes the Save button available. I save it and it takes me out of the holiday call flow setting, so I go back in (my new greeting is now saved) and change the Directory search option back to what it was previously and save again.

There's got to be an easier way, right?