airplanes caught by airport after take off

[NewHope4Future]

one airport on my map doing strange things. there are airplanes coming and landing but after take-off they are just circulating over airport and not flying away. i've tried to delete airport or place it somewhere else, nothing helps. the airplanes are still circulating over the previous airport location.

what's the issue?

here is a link to my savegame, because it's too big for uploading here.
https://mega.nz/#!G0Um1LyR!ZBMhtUbcYHk87FrBGX_jyv0SI1s1rYSS2hepbs5WZU4

best greetings

 

[ThumperInSF]

I'm having the same problem. Airplanes continue to endlessly circle above the location of an airport that I have since moved. Also, airplanes take off and circle endlessly (see attached screenshot). Anyone have possible solutions?