Actually, the problem is "only" with negativ DEC values between -1° and 0°. I confirmed this with 12, 13, and 14 Piscium. 12 and 13 Piscium are around 0° -57' DEC, while 14 Piscium is at DEC = -1° 07'. For the latter, the GOTO worked with plate-solving - no issue. For the other two it did not and the mount always slewed to the corresponding positive/inverted DEC values.
Could anyone, please, double check this with his/her mount?
I am using the latest beta version of ASIAIR/FW (2.0 (52) - 10.34).