tunes, I'd like to test that out and see if there is an issue. Structurally, there is no difference between the arenas/servers. Terrains should not have an impact on how the TrackIR performs.
But, just because it "shouldn't" have an impact doesn't mean something in there isn't playing the funky chicken with your settings.
Do you fly in FSO? Does it have an issue there? How about Snapshots or Races? Has this happened in the past, since I know you have been in other scenarios? Is this a one off problem or something that is happening all the time?