OSX VST3 UI is showing 2 times the actual size


I’ve made a plugin and people are reporting that the UI not is showing up but audio is playing on OSX.

EDIT: the original issue was resolved but a new one introduced. (read below)

I got the UI showing but I now have another issue…

The plugin UI shows 2 times the actual size. This only happens on Studio One, OSX, retina.
I’ve read about this issue before here on the forum. Seems to happen since the last VS3_SDK.
Is there a way to fix this?