Have you or anyone else had the fairing off recently? I have seen before where the wiring harness was not routed well or correctly during reinstallation and the harness was getting pinched. The wire would break inside of the sheath it is in. Look for an area on the harness where it looks unusually flatter or distorted. Check the bulb socket and make sure the contacts are good, verify this by comparing it to the other side or even the rear. Also if you are familiar with an ohm meter, disconnect the harness, remove the bulb and check for continuity on the connector end to the socket terminals. Or, remove the lamp assembly from the right and plug it into the left and left to right like you did with the bulbs. If you are coming up with nothing there then you will have to dig into the main harnesses, but have personally never heard of the problem going back that far unless somebody was messing around with that part of the harness.
2019 Silver Flux/Black Fuse FLTRU