I shoot panoramas a good bit, and always up to now, I download the panos to my phone by opening the picture in DJI4, the software will stich the panorama, then display it.
If I want to keep it, I hit the "Download" icon.  But since yesterday, that button/icon does nothing when I touch it.  Nothing.  I have to click "SHARE" then another button, then "Save to Camera Roll".

Anybody else have that issue?

Was there a update of the Go4?
If yes, go to apkmirror and get/try the one from before.

Hi, thank you for reaching out and we do apologize for the inconvenience caused. May I know what happens prior to this issue? Also, can you please try to sync all your flight records in the DJI Go 4 app then try to uninstall and reinstall the app to see if the issue will still persist. Please keep us posted. Thank you!  

OK, I'll uninstall and re-install the app and see what happens.

By the way, why is that always the first course of action with DJI GO4?  To re-install the app?  Isn't that the same as "turn it off and back on again"?  I don't have any other apps that need to be re-installed.  SMH.