Rho2017 Same thing happened to me (the movement will go only one way even if it was supposed to change direction). Changed the area of the sky, rebooted the mount, the AA and it was still doing the same thing.
Calibration went back to normal after I did a GoTo; previously I was slewing to the area where I wanted to calibrate.
Now that I am thinking about it, the difference before a GoTo and after is the Tracking being turned ON automatically. I am not aware that tracking OFF would have such an effect on calibration; that could be either intended behaviour or a bug.
I will wait for the next clear night and do some calibration tests with tracking on then off to see if it happens again or not.