As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AFTER 2 HOURS IN FLIGHT, THE DOOR PAGE SHOWED DOOR 1R DISARMED (IT WAS ARMED AFTER DOOR CLOSURE ON THE GROUND).FLIGHT ATTENDANT TAPPED ON THE DOOR AND IT ARMED AGAIN. AFTER SMOOTH LANDING, WHILE TAXING DOOR 1R SHOWED DISARMED AGAIN. MAINETNANCE REPLACED THE R1 DOOR SLIDE ARMED PROXIMITY DETECTOR 4WN2 AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 52-71-00.