Crash while switching

Trying to switch from big to selfie camera, and the preview showed darkness. Switching back and back again made Megapixels crash, without leaving anything bad in dmesg:

Found postprocessor script at /home/purism/mpi/share/megapixels/postprocess.sh
MPDevice: MEDIA_IOC_SETUP_LINK error 25, Inappropriate ioctl for device
format 3 47425247
^[[OMPDevice: MEDIA_IOC_SETUP_LINK error 25, Inappropriate ioctl for device
MPDevice: MEDIA_IOC_SETUP_LINK error 25, Inappropriate ioctl for device
format 10 30314247
[here's the switch to selfie I think]
MPCamera: VIDIOC_S_FMT error 19, No such device
^[[I^[[O^[[I^[[O^[[I^[[O^[[I^[[O^[[IMPDevice: MEDIA_IOC_SETUP_LINK error 25, Inappropriate ioctl for device
MPDevice: MEDIA_IOC_SETUP_LINK error 25, Inappropriate ioctl for device
format 3 47425247
MPDevice: MEDIA_IOC_SETUP_LINK error 25, Inappropriate ioctl for device
MPDevice: MEDIA_IOC_SETUP_LINK error 25, Inappropriate ioctl for device
[second switch to selfie]
Segmentation fault