It appears every few times I open the app and the usual android back button doesn’t make it go away, and there is no cancel button. What you have to do is toggle the toggle, then the button will change to “do not back up” and then you can press it. It annoys me how easy this makes it to accidentally turn on backup.
Ya, ran into this one recently. Had to install gcam instead of stock camera on my OnePlus just so I can use alternative gallery. Android is not truly open source project anymore.
And then if u try using alternative roms - half the cameras your phone has and banking apps are not going to work - Google intentionally castrated the functionality like this.