OK, well... That's a bummer. I don't really have much insight here. SGPro takes the data from the camera and writes it directly to the FITS file. It does not modify it in any way. In addition to this, your camera uses the same exact code as any other ASCOM camera. There is zero special code for SX cameras.
In your shoes, I would, using the ASCOM driver in both applications do the simplest thing that reproduces the issue. In each case (SGPro and MaximDL), preserve and compare the SX ASCOM camera logs to see if something different is happening between the two applications.