Error code : 80018 - Invalid connection id (invalid format)

This is unexpected as it It implies an invalid connection Id has been supplied.

Note: If you are seeing resumes failing with 80018 "Invalid connection serial" in ably-js, this was a bug in ably-js versions 1.2.30 through 1.2.33. Please upgrade to the latest version of ably-js

Please raise a support ticket with details like appId, necessary logs, and steps to reproduce the error, and we'll investigate what's happening and get back to you