RED in Color 1.5

To my surprise, I was able to load a R3D shot directly into Color, not only that, playback was great, not perfect, but great!
The only thing that I noticed, and I don;t know if this is a bug or not, is that the 4K shots, when I'm parked in the timeline there's no output, in my monitor and in Color's preview monitor, Color's scopes show nothing either, but when I play it plays with no problem, and everything is back to normal in Color. Red 2K files are ok though, when parked I get visual reference.
I tried changing sequence settings, and even at 4k sequence the 2K clips look half sized, and all the red control act normally, but the 4K shots only shows when playing only. Is this a bug from Color, or we need a new REDCODE version?

Anybody had success grading a RED 4K shot?