Beta 26.5 unusably slow vs 26.3

I have been using Beta 26.3 for the color mode to color grade my videos (I still edit them with the latest official release) but when I upgraded the beta to 26.5 it became unusable. It’s so slow I can’t do anything. I have tried all the 26.5 versions that have been released, including the one released today on the 25th of June and all of them are sow slow I have to uninstall and go back to installing the 26.3 version to be able to work. I’m getting really worried something important changed with 26.5 and that will continue with each new beta version and I won’t be able to work with the latest versions. And even worse, that the same bug continues to the latest official release when the Color Mode get’s released there. 

Am I the only one having this problem with the 26.5 versions? When I click any of the color tools it takes a few seconds to show the HUD and when I move the mouse it fakes a few seconds to show any change. It’s too slow.