I have recently been having issues with taking exposures with my ASI 294 (primary imaging camera) & 120mm Mini (guide camera). I'm using the latest stable version of KStars/EKOS on an RPI3.
My cameras are failing after doing a plate solve, or meridian flip. In addition the exposures will fail mid sequence. Also the guiding camera will lose connection.
The result is I have to continually monitor the sequence (resulting in late nights), as I have to re-connect the cameras.