Edit vs Color Page

Hi Guys, anyone experienced similar...i am editing dng raw on windows, davinci 16.2 beta...if i make a new node and do colour correction and try to play the footage at the colour page the video plays choppy like 8fps but if i switch to the edit page it plays perfectly realtime in 25fps as it should be. Any idea?

The edit page drops frame to keep sync with audio, the color page does not.

The edit page drops frame to keep sync with audio, the color page does not.

There is no drop frames , it is a perfectly smooth 25fps playback as it should be with a 12 core cpu and a gtx1080ti

If you're leaving the GUI viewer on the Power Windows mode, that can have a large performance impact.

If you're leaving the GUI viewer on the Power Windows mode, that can have a large performance impact.

I am speechless, what is wrong here ?? I can throw 20 nodes on the dng files and it plays real time as it should with this powerful machine on the edit tab but why not on the color tab????? PLS someone any idea ?? Is it a bug or what??