I know your problem, you need to go back to 1.18 ETS2 version and wait for ProMods 1.96 which will support the 1.19.... because ProMods team never touched these areas....
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Same problem for me, I'm coming from the opposite direction (from Graz side) when you hit that rest spot you fall under the map. You can try what I just tried (didn't work still crashed) use 0 (zero) to get into dev cam using your num pad to move ( 8 = forward) once you get to the exit for Graz bring the cam as close to the ground as possible then hit F9, it'll teleport your truck to that location.
As I said before, it didn't work for me I still crashed when I was moving the cam over that section of the road.