I tried changing the auto-exposure (enabled by default ?) in the controls tab.
I also played with the resolution option, but I guess weird behaviour ranging from, getting an image after a very long time, to driver disconnection + getting the client interface reseted for the camera.
Nothing more than the previous logs are shown in those cases unfortunately... It is really a shame that the driver is that bad with regard to the consistent behaviour I have with ZWO ASi cameras.