I have the latest updates and I'm checking my updates daily for a fix, and it is still broken for me.
I no longer have the Dolby Vision check box in the windows display settings, but every time I turn my PC on it is in dolby vision mode, and I have to open the windows display settings window to get it to switch off, its a bit quicker than it used to be as I don't have to go into the HDR settings and click the dolby vision box (just opening the display settings switches it off without having to click anything).
This isn't even bodged to allow me to turn off dolby vision persistently for me, never mind fixed which would mean be giving us back the blue channel when in dolby vision mode, so that we can actually use the feature.