Further testing this, I removed all mods from my community folder, except for the ones in question - EDDK and Navigraph Navdata.
Again, same result on ILS RWY 14L…
Navdata installed:
Without Navdata installed:
And ‘just for fun’ I thought I’d try on ILS RWY 24 as well. Exact same issue…
With Navdata installed:
Without Navdata installed:
Please let me know if you can recommend any further troubleshooting and/or any further information I can provide.
Further, an observation I made was that when spawning in on approach (by selecting a destination airport only), you can visibly see some visual ‘shift’ in the location of the runways/airport with the Navdata installed, as when you spawn in the aircraft should be aligned perfectly with the runways’ extended centreline. With the Navdata installed a turn is required to get onto that extended centreline, without the Navdata there is not.
It’s almost like there is a mismatch between certain areas of code for the sim which I don’t know enough about to comment on comprehensively. And I appreciate you say the Navdata doesn’t mess with any scenery but this is just my humble (and maybe slightly nieve (to the inner workings of the sim) opinion).
Example (with Navdata installed), taken just after spawning in:
