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I've got the same issue in the Chrome browser.  The toggle won't stay off and there's no way to save that setting.  When you exit and come back to the screen, the chrome browser notification toggle is back on again.

I have the same problem.  When you return to this screen after exiting, you find that the setting has been turned back on.  There's no way to make this setting stay turned off.

This doesn't work.  You can turn it off, but there's no way to save that action, and when you come back to the page it is turned on again.  I need a permanent solution to stop these notifications.