There is a bug in the ASOBO G3000 which doesn’t draw routes which cross the international date line. The pic below shows this bug. The curved purple line is the correct route. The straight purple line is the error, and ‘reflects’ from the IDL.
No route is shown beyond the IDL.
As you cross the IDL the curve then redraws from the plane forwards, and there is another straight line in error shown bouncing off the IDL and proceeding ahead of you, so the opposite of what you see in this picture.
You don’t need to be doing a trans-oceanic flight to experience this. You could be flying around southern Alaska, far out into the Pacific etc. It is a bug in the sim with no mods loaded.
There is a separate and perhaps linked bug if I load the 0.34 G3000 mod into the sim. With that in place the sim crashes with a solid lock moments after crossing the IDL. I’ve reported that to the author of the mod.
Lastly, I had an apparently unrelated CTD today flying the TBM930 on a very long flight. I was doing the flight as a robustness test before bothering to set out on a round the world flight soon. After about 7 hours in the TBM at cruise altitude the sim CTD’d. I’ve done many other long flights previously without CTDs. Also this CTD was over China, so the IDL was not involved.
It may just have been a freak bug, but something is obviously not quite right somewhere.