So I managed to repoeat the issue last night while imaging Cent A. Meridian flip completed, post flip alignment was fine, but it failed on auto-guiding. Looks like it couldn't find a guide star and just gave up. I was using the internal guider. The relevant part of the log file is below and I've attached the full file. There's also a screenshot of the guiding module which is complaining about mount back-lash. Never seen this error before so figure it's just a generic "it failed and I can't be bothered recovering gracefully" error.

[2020-04-22T23:29:00.787 AUS Eastern Standard Time DEBG ][ org.kde.kstars.ekos.guide] - Iteration # 21 : STAR 131.712 , 90.1625
[2020-04-22T23:29:00.793 AUS Eastern Standard Time DEBG ][ org.kde.kstars.ekos.guide] - Iteration 21 Direction: RA_DEC_DIR Duration: 2000 ms.
[2020-04-22T23:29:00.799 AUS Eastern Standard Time DEBG ][ org.kde.kstars.ekos.guide] - Star x pos is 29.7237 from original point.
[2020-04-22T23:29:00.804 AUS Eastern Standard Time DEBG ][ org.kde.kstars.ekos.capture] - Guiding state changed from "Calibrating" to "Calibration error"
[2020-04-22T23:29:00.810 AUS Eastern Standard Time INFO ][ org.kde.kstars.ekos.capture] - "Post meridian flip calibration error. Aborting..."
[2020-04-22T23:29:00.816 AUS Eastern Standard Time INFO ][ org.kde.kstars.ekos.capture] - "CCD capture aborted"
[2020-04-22T23:29:00.823 AUS Eastern Standard Time DEBG ][ org.kde.kstars.ekos.capture] - setMeridianFlipStage: 2
[2020-04-22T23:29:00.829 AUS Eastern Standard Time INFO ][ org.kde.kstars.ekos.guide] - "GUIDE_RA: Scope cannot reach the start point after 21 iterations. Possible mount or backlash problems..."
[2020-04-22T23:29:00.837 AUS Eastern Standard Time DEBG ][ org.kde.kstars.indi] - ZWO CCD ASI120MM Mini : "[DEBUG] Uploading file. Ext: fits, Size: 72000, sendImage? Yes, saveImage? No "
[2020-04-22T23:29:00.842 AUS Eastern Standard Time DEBG ][ org.kde.kstars.indi] - ZWO CCD ASI120MM Mini : "[DEBUG] BLOB transfer took 0.00132023 seconds "
[2020-04-22T23:29:00.848 AUS Eastern Standard Time DEBG ][ org.kde.kstars.indi] - ZWO CCD ASI120MM Mini : "[DEBUG] Upload complete "
[2020-04-22T23:29:01.252 AUS Eastern Standard Time DEBG ][ org.kde.kstars.indi] - ZWO CCD ASI294MC Pro : "[DEBUG] Aborting camera exposure...

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