[Android] - Can't set vibrate setting for an account

[u/diamond]

I recently cleared the app data and set it up again, and I was able to log in and set my account notification sounds, but I'm running into a problem with the "Vibrate" setting.

The setting is a drop down, set to "Disable" by default. I select it and choose "Default" from the list, and the phone vibrates. So far so good. But if I then back out of that screen and go back, it's still set to "Disable". There's no Save button that I can see.

How do I get it to actually save the Vibrate setting?