Account creation page displayed when trying to pair again after being signed out

[bsurd]

Steps to reproduce

1. (Mobile) From the Settings select Pair with Firefox Desktop
2. (Dekstop) Go into "Manage account" and change your password or delete your account
3. (Mobile) After being signed out try to pair with the same or a new account on desktop

Expected behavior

• A confirmation message is displayed on both Desktop and Mobile

Actual behavior

• On mobile you're redirected to an account creation page while nothing happens on desktop.

Device information

• Android device:
  • Sony Xperia Z5 Premium (Android 7.1.1)
  • OnePlus 5T (Android 9)
• Reference Browser version: 1.0 (Build #10351419)
• Logcat
• Video