Boot issue with linux 4.4 after shutdown

I’m getting an issue on the board where, after building and flashing a Linux 4.4 kernel on focal using fenix, the board will boot once and work until shutdown. After the board shuts down, on the next boot it will hang without outputting to the HDMI, yet the white led will flash (although it seems to flash more frequently than before, however that may just be my eyes playing tricks on me). Any insight as to what could cause this?

Can you attach the serial debug tool to check the boot logs?