Thumbnail color problem on Color page

Testing to take Davinci Wide Gamut into use as timeline color space but seeing very strange color behavior of the Color page thumbnails. Usability is quite hard with the thumbnails showing up like this, hard to recognize/identify the clip + gives no realistic indication of grade status?

Thumbnails wide gamut.jpg (130.94 KiB) Viewed 450 times

Color managed project/timeline, input clips are Rec.709 managed by Resolve, SDR display, tested both with and without Windows managed HDR.

Have a 4 node clip grade, node 1 HDR grade, node 2 has linear gamma (used for color adjustment), node 3 HSV color space for saturation adjustment, node 4 null. Using timeline grade (DCTL) to go from timeline color space to rec 709. It kind of looks like the thumb is picked up from node 2 (node 2 node thumb looks like the ribbon thumbs)?

Edit page thumbs look as expected:

Thumbnails wide gamut edit.jpg (23.8 KiB) Viewed 450 times

Any idea what is going on? Is this "works as indended" or am I missing some setting or is this a bug?

I'm no professional Colorist, but to me it makes no sense to use DWG with Rec.709 footage. Just use this:

RCM SDR.png (17.75 KiB) Viewed 133 times

I'm no professional Colorist, but to me it makes no sense to use DWG with Rec.709 footage.

Well, yes and no. Normally I would do exactly what you suggested. Just discovering that some material which is "challenging", DWG seems to make it easier for me to get better (subjectively) results. YMMV