oddebian I have exactly the same board, with same markings on the board. So it must be something on SW side. I did few more tests with official LE 10.0.2 release and I managed to get corrupted deinterlacing only once. However, it stayed corrupted also over reboots until I plugged off power supply for few seconds and plugged it back on. After that, I couldn't reproduce it anymore. So it must be some issue which persists over boot. Maybe some clock setting. Can you provide output of cat /sys/kernel/debug/clk/clk_summary, executed during bad deinterlacing?
EDIT: I managed to reproduce it once on latest, self-build image. However, reboot restored deinterlacing.