vscode.dev asking for Settings Sync sign in again after enabling Cloud Changes

[TylerLeonhardt]

From @sandy081 originally

• Opened a new insiders.vscode.dev window enabled settings sync
• Opened a remote github repo in that window and turned on cloud changes feature
• Opened new insiders.vscode.dev window to connect to tunnels using MSFT account.
  🐛 I was asked to sign in to sync settings
• In the first window, I connected to azure repo
  🐛 I was asked to sign in to sync settings

I can repro this. The interesting thing is that it seems like we do return a valid Settings Sync token... so I wonder if this is maybe something similar to #229456

[alex180500]

Got the same problem!

[JohnPiepersSmits]

Have the same issue too!