Connection manager switches to fallback hosts on close #950
Description
When the transport becomes unavailable due to a number of reasons (including a clean close, or an abnormal close) the connection immediately jumps to a fallback host if the internet is up.
This is because the check for whether to use fallback includes checking for a pendingConnect, as well as the error reason being "server related". The pendingConnect is set when the connecting state is enacted, but not cleared apart from checkFallback if it's decided not to use a fallback.
This means any time the connection closes for a number of reasons, then the connection will immediately fallback and not resume.