Heli rotor disk goes invisible

[eddiscus]

Only happens on my Mac Workstation running windows 10 in bootcamp.Video card is an AMD Radeon HD 5800. RF 7.5 does not have this issue.

 

[RemyHeli]

I have this issue with RF 9.5 as well RF 9.0 install from disk. PC Windows 10, tried on 2 different machines but no luck: Rotor disk goes invisible at medium RPM. Especially visible with scale helis. Works great on 7.5. Possibly issue started since version 8.
I'm so disapointed with RF 9 not displaying rotor disk at all speeds .. Does anyone has a tip?