I finally got the gear indicator issue resolved. As previously stated, once the engine warmed up, 1st and 5th gear disappeared from the oled screen.
Before finally swapping out the complete sensor, I removed the original sensor head located under the shifter, did a few passes on the contact surface with fine grit, cleaned and reinstalled. The 1st gear reappeared but the 5th was intermittent at best. Still worth a shot if it does the trick. Maybe a couple more passes would of worked.
The new sensor assembly swap was your typical Vmax affair, easy but annoyingly time consuming since everything is crammed so tight on the Max. You can use the original Oring on the new sensor head and no need to wait for an oil change since only a very light oil film leaks when the sensor head is removed. I simply had everything set up for a quick swap to minimize any loss.
All in all the gear indicator isn’t a necessity but given everything else on this incredible machine has been bullet proof, it bugged me every time I went for a ride.
Hope this helps. Cheers!