I had a pier crash yesterday night with the ASIAIR on my Astro-physics AP900 mount, due to meridian flip failure.
At first I though that it was a DST setting issue, but DST is turned off on the mount. I think there's an issue with the new ASIAIR firmware.
If I power on the mount with the mount controller connected but not the ASIAIR, the controller displays the correct settings: local time is correct (not taking DST into account), local sidereal time is correct, time zone is correct.
If I power on the mount with the ASIAIR connected but not the controller and connect the controller afterwards, the controller displays wrong settings : the UTC time is one hour ahead of local time instead of being one hour behind. In other words, time zone +1 E has been switched to +1 W in the mount controller when the ASIAIR synced to the mount. As a result, the local sidereal time is off by two hours.
I had used this setup for almost a year, without any meridian flip failure so I believe the new firmware is the culprit. There's nothing special in my workflow: PA, GOTO to target, guiding on, AUTORUN for the whole night with meridian flip enabled.
Another (probably unrelated) bug with the new firmware is that the autoguide calibration data does not seem to be stored anymore.
Thanks for your help!