Hi Bones and thank you for your reply!
I completely agree with all your considerations.
You can easily replicate the problem I encountered by following these steps:
select any map and open it from mission editor
spawn any carrier and set its tacan (in my case I chose CVN-75 and set the tacan 75X)
spawn a tanker and set its tacan (in my case 36Y)
spawn an F14 and set it as "player"
start the flight
immediately in the cockpit (you will spawn in the air), we will find the tacan automatically set to 36Y; the moment you try to enter 75X, however, the range will remain "frozen" for a moment and then disappear until the carrier is about 19/20 nm away.
Please let me know if you also get the same result, if you have the time and the will, of course.
Thank you!