Non Directional Beacons Quit Working After Awhile

[VAF [136] Striker]

Flew from Kolki in Georgia to Gali city NDB and then to Sukhumi and then tried flying back using the reverse. Gali city NDB and the previous airbase NDB's no longer worked. Already experienced this in two different missions using two different destinations. Don't have a track file as it's too big but I'll try to do a short one and post it. Definitely a repeatable bug from what I've tested so far.