Mission editor: "runway busy", but it isn't

[coconut]

See the attached file. Extract in data/Missions, start it, activate auto-pilot. After 15s, the two bf109-f4s will start the engine start-up sequence. When it's done, there is a message radio requesting take-off from the runway, which is denied because the runway is supposedly busy.

 

I've tried moving the planes, tweaking the airfield chart, no luck, always the same result. If I instead move the fakefield object and edit its chart to use the south-to-north runway, things run as expected. The runway oriented to north-east on the other hand appears to be always busy.

 

The airfield in question is Rjev, located in 1005-3

 

BUG-runway-busy.zip

[Urra]

Unexpected elevation change between the points?