Currently running X-Plane 10.51r2 (build 105101 64-bit) on OS Windows 10. Having issue with ATC functionality on multiple aircraft choices.
At most times, ATC functions normally from CLNC DEL, GND CON, TOWER, Flight Plan completion, etc
At other times, when ATC is called, I only get a "BEEP" sound. Only functionality is Flight Plan input. Any other options give the "BEEP". Switched between COM1, COM2 to settings with same issue on all settings.
Sometimes a complete reboot of system clears the issue, other times it does not clear issue.
Hoping to upgrade to XPlane 11 in future, but wish to correct my current XPlane 10 issue.