Bug fixMake iOS sign-in reliably recoverable
Fixed an issue where sign-in could stall on iOS. If it fails, you can now retry right away and complete signing in smoothly.
Signing in with an external service on iOS could occasionally stall and leave the screen stuck.
With this fix, a stalled attempt is automatically released after a short time so you can retry immediately.
The sign-in handoff happens in the browser, making it easier to finish logging in.