Navigation Database - inconsistent information

Sim is at Latest Beta but this problem has been inconsistently present for over a year
Navigraph up to date, GTN is up to date, and all other nav stuff seems to be up to date.

flying at 8000' Nearest VOR shows JLI OCN TRM MZB PGY. I tune JLI (113.75) in GTN750Xi - in some planes the JLI letters appear on the screen next to the frequency in others, during the same sim session, the JLI does not appear. In both cases the other instruments (HSI, RMI, LOC, DME) do NOT "see" or respond to the JLI signal. JLI was 10 miles distant. I then tuned OCN and TRM (both within 25 miles) and again the instruments do not sense a signal. I then tune MZB at 30 miles and PGY at 35 miles and all the instruments react properly.

During other sim sessions everything works perfectly and all VORs are sensed.

The same inconsistency occurs with WayPoints. I try to do a Direct to Julian and the GPS finds a "JLI" waypoint but it is thousands of miles distant and no report of "Duplicate" occurs. I use navigraph to go to the Lat/Lon shown and there is no JLI at that location. Some sessions I can only go direct to Chinese waypoints and other times I can do Chinese and Russian waypoints but not any Western Hemisphere waypoints. Again, this is independent of airplane or GPS/Nav instrument. During many sim sessions the waypoints work perfectly.

Those problems occur in many different ASOBO, MS, and add-on planes. It is also inconsistent with which VORs or Waypoints are a problem. I have seen the problem in dozens of sessions anywhere from Canada to Mexico west of the Great Plains.

Both problems also occur when I am building a flight plan in the sim on the GPS. If I then download the identical flight plan from Simbrief or other planning software - the VORs and Waypoints are found and used correctly during the flight.

Do I have a corrupted database somewhere. The problem has survived to major release updates and all the recent updates.

Where do I start looking? The problems are occurring more and more frequently.

Edited October 24Oct 24 by TacomaSailor