I've tried a few times, even selecting approve all. Still the same result. Cleared cache & data on the app, logged back in, still the same. I've even reinstalled amber, no luck. I can't remove the npub saved to the account, and that is where the problem lies I think.
Discussion
In Fountain, it looks like you can delete the nostr keys by going to settings => account => nostr account => three dots icon on top right
That's what doesn't work, the key stays.