The problem is in KDFW. I can rename APX22200.bgl (in fs-base\0202) as APX22200.bgl.orig
This erases the airports of that whole area. I then move the asobo-airport-kdfw-dallas-fort-worth folder to my desktop to deactivate that in the sim.
I then decompile APX22200.bgl, comment out the KDFW in the XML file, recompile in a package, add to the Community folder to replace the missing APX22200.bgl…
And it works. 76T at 52 FPS. Draw On Terrain is ticked.
I have no idea what’s wrong with KDFW, but it is also wrong in the default within APX22200.bgl