After bootstrapping cross-signing, you're prompted to verify yourself.

[ara4n]

• Log into riot 1.6 on a pre-cross-signing account
• It prompts you to bootstrap via popup
• After having bootstrapped, it tells you to 'verify your session' (sometimes this then disappears) - surely it should know to trust this session.

[jryans]

This sounds similar to #13181, but for the current device case. I assume the toast is waiting for remote echo of some data, so we'd need to resolve toasts locally / optimistically in some way to avoid this.