Notifications settings ran amok, self-toggling rapidly, until request limit reached

Describe the bug When I was attempting to change notification settings for a Mastodon account via Preferences | Notification Types, the client got into a state where it was rapidly toggling the notifications on and off by itself, until the server's API request limit was reached and locked me out. Video linked below demonstrates.

To Reproduce This bug is seen-once because I dare not try to reproduce it (for fear of being locked out of my instance altogether). What I did was:

Click on my avatar icon at the top-left of my Timelines page
Click ⚙ Preferences
Click Notification Types
Toggle several notification sliders from on to off in quick succession.

The client then got into a state where the sliders were rapidly flipping on and off by themselves.

I clicked each slider only once, but I went from top to bottom very quickly. It is possible that I toggled eg Reblog before Favorite had finished moving.

The settings were all in default state to start with.

Expected behavior I was hoping to turn off all of my notifications except for "mention", by clicking them from top to bottom.

Screenshots The attached video shows the last few moments of the preferences page self-toggling, followed by the "Too many requests" error that locked me out of the instance. This behavior had been going on for about five seconds before I started recording.

https://user-images.githubusercontent.com/3677274/201581081-9246b327-4847-4159-8b34-544e7ab947b5.mp4

(please complete the following information):

Device: iPhone 13 Pro
OS: iOS 15.6.1
App Version: 1.5.3 (1)

metabolist / metatext

Notifications settings ran amok, self-toggling rapidly, until request limit reached #165