Color Corr and effects disappear on several frames of a clip

Hi,
I working my first project on D Resolve 17. It works well but:
After applying color correction nodes, some of the clips flash or flicker. Watched one by one, they look like the correction disappears on some of the frames of a clip in the timeline. I haven't noticed anything on the color page monitor, but when playing the edit page timeline or in full screen it is noticeable how a few frames have no correction. They look milky i contrast with contiguos frames. The result is flickering series, they can be several alternate frames or just a frame here or there.

The first I encountered I re-made all the nodes from scratch and it cured the problem there. But, then, the same problem appears on other clips.

Most clips have 3 nodes applied: one for correcting lift and gain, another for haze and a third to compensate temperature.

Any suggestions.

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Is there a way to migrate the post, Jim?
Thank you.