Currently I'm exploring how NV clearing is done when an older software version is loaded... It seems that NV is read into RAM and initialized BEFORE doing this. So the firmware can still crash in theory if NV is severely damaged. But I can't know for sure, of course.
Therefore, b224, can you try flashing a firmware with lower version (lowered by RGN_Tool, for example) before trying my previous [Only registered and activated users can see links. ]?