Thanks for all your replies. I did update the drivers on my video card which didn’t change anything and I played around with turning animations both on and off which also does not seem to affect the Flash. However one thing I just noticed with Nexus is that it flashes a black screen just as it opens which is much more tolerable and easier on the eyes. Please see video
I have the white flash on 4 different computers, some AMD gfx some nVidia, does not make a difference.
I pose like a photo model every time I open the mixer.
Blitz.
The worst offenders I have found are Halion Sonic 3 Groove Agent 4 and opening the full mixer is almost blinding. lol
I upgraded to Windows 10 as well and have noticed no difference.
Still evident on 9.5 here on Windows 10, ASUS R7 240 Series graphics. But only really noticeable on Halion sonic SE3 and similar GUIs which seem to take a long time to draw. No problem opening main mixer or most 3rd party plugs. In summary, it’s a slight nuisance, but not a showstopper
Maybe Steinberg can update these plugins to not have the flashes. What is fixed is the native windows like the MixConsole, which I personally think is major.