v3 server silently crashes

Bug report

Summary

While running large scans in v3, the scan can silently freeze. The stream remains live until the window is refreshed and the log doesn't give useful information. As it seems to be a camera thread issue, ofm restart hangs indefinitely, requiring a power cycle

Shutting down
Waiting for connections to close. (CTRL+C to force quit)

Configuration

I'm using:

Pi Camera 2, Pi 4, Sangaboard 5, v3 of software

/cc @rwb27