Were you ever able to resolve this? I'm trying out an IMX290 board on Stellarmate and having the same issue.

I was able to get 1920x1080 images using INDI-Webcam, but it doesn't have any gain control (or other settings) and the pixel size is wrong.

I'm having the same crashing issues with the V4L2 driver unless the camera is set to 640x480.