After three hours of analyzes, I have figured out that the flightplan-format is not correct.
I have built exactly the same flightplan in our charts and have also exported this flightplan and this flightplan is working as expected.
Again, it is NOT an addon issue nor an navdata issue. it´s simple a wrong format of the exported flightplan from PFPX.
Here the same flightplan, exported via the Navigraph charts:
ESSALFMN_NG.pln (23 KB)
You can try it with the default aircrafts and with the FBW mod. No freeze anymore, when you load this flightplan via the worldmap with NO changes.
Cheers,
Richard