Raw exposure clipping the highlights when node added

Since updating to Resolve 15, I'm encountering weird behavior when setting my Cinema DNG raw exposure in the Camera Raw panel. I place exposure where I want it and have unclipped dynamic range, then when I add a node, the highlights will clip, and all the highlight detail gets blown. Just a tiny change to the raw exposure slider will restore the highlights. I'm guessing it might be a rendering problem with the render cache (I keep smart render on). Is there a fix for this?

Thanks!
Joel Silverman
Resolve 15.0.0.086, Mac OS 10.13.6, 64 GB 1866 MHz DDR3, 2.7 GHz 12-Core Intel Xeon E5, AMD FirePro D500 3072 MB

The added node is empty, no changes made?

That's right, just the action itself of creating an empty node causes the highlights to clip hard.

I've been working with the Pocket's cDNG footage for over a year, and I've never once observed this behavior.

I wonder if it's a Mac only issue. (I'm on Windows.)