I had the same problem and almost sold the Asiair before I saw a post by Jerry and tried the alternate firmware. That fixed the problem and it hasn’t happened since with either the original Asiair or the Pro.
Scope: ES ED102
Mounts: ES EXOS2-PMC-8, SkyWatcher Star Adventurer
Cameras: ASI1600MM Pro, Nikon D7500
Lens: Nikon 200-500mm, Tamron 70-200mm G2, Nikon 120mm manual lens
Misc: ZWO ASI120Mini Guide Camera, ZWO 30mm mini guidescope, Stellarmate, Asiair
Software: Kstars, SkySafari, ExploreStars (android), Pixinsight, DeepSkyStacker, Regim, Astrostakkert, LR/PS, RNC-color-stretch
Computer: Macbook Pro, Surface Pro 4, iPhone, Fire 7