I have the issue on P3D V4.4. Installed P3d properly by uninstalling content and client first and following the LM documented procedures. App listing in windows shows 18.104.22.168077.
Running Activesky, GSX at Elgin default airport.
So it appears as if it happens on 4.4 as well.
One thing I did do was re-download a livery (Singapore cargo) as all my liveries were gone for the 8. I got a warning message asking if ok to overwrite, as the texture existed. I said yes to both prompts. Hope that helps.