Zonestar End Stop Issues (no replies)

Hi All,

I have "upgraded" my Zonestar P802M with a Rumba board and Marlin. It seems that all is ok, but every now and then the printer ignores the x-min endstop and it I have to hit the emergency stop ("nasty grrrrrrrrr") . It happens mostly after Home, but is inconsistent. Many times it is fine. I do not think it is mechanical, but I cannot determine a pattern. Please see my files attached

Best Regards
Jean