It has been fixed for me (see above). All I can suggest is to keep posting here and emailing support until you get their attention. Good luck!
I am experiencing this issue as well. Since it appears to affect all Gmail accounts, and a fix has been implemented for an individual user, would it be possible to apply that same solution globally to all Gmail accounts?
Hello, your email has now been cleared on your FlightAware account. Please let us know if you continue to experience any further issue.