This is in no way a bug (and no change was done on flying code viewer side in ages), but I noticed such a behaviour when the destination is no-fly and the server it runs on is RC Magnum. It's most probably a server side change (some sim owners might have been complaining that incoming avatars are flying while their land is no-fly)...
I cannot reproduce this bug. Try starting with a fresh configuration (delete settings_coolvlviewer_126N.xml in the user_settings directory), in case you'd have touched a setting that affects camera focus.
In any case, I cannot investigate without logs (follow the
rules !).