commit: 00c9eb732f0410b4411d295d6e19ad79d63d60d8
Changing handle from Tranquil's web UI appears to make the handle invalid on Bluesky.
My test account (Bluesky, Witchsky, PDSls) now shows @handle.invalid on Bluesky, but not elsewhere.
Setting the handle again from Bluesky itself seems to fix the issue.