Dark colors are clipped and displayed improperly in Photoshop 2020

Using Photoshop 2020 on Windows 10.  When opening files with dark tones (seems to be levels around 25 or lower), they appear to clip early.  As such, pure black or near pure black is displayed as 14,14,14 instead of 5,5,5 or 0,0,0.  All dark tones are clipped to that artificial dark gray-ish color, and colors themselves appear posterized at low levels.

The files themselves are perfectly fine, as they are displayed properly in the RAW editor (both Lightroom and Capture One Pro), and also display properly when the files are opened in Photshop CC 19 (which I have installed alongside 2020). I also can export the file or such, and when viewing that exported file in another program (even Windows photo viewer), it looks perfect...it only displays improperly in Photoshop 2020.

First thing I checked was to see if Proof Colors were on, and they are not.  I can't see any setting that would cause this.  Obviously not a video display driver issue, as it displays properly in every app except Photoshop 2020.

As a sample: this image shows how the image is displayed when rendered properly:

http://www.jordansteele.com/2019/ps_weird3.png

This is a screenshot of the image as it is displayed in Photoshop 2020:

http://www.jordansteele.com/2019/ps_weird.png

This is a screenshot of how the color picker is displayed in Photoshop 2020, showing what happens to the display of colors at the low end:

http://www.jordansteele.com/2019/color_picker.png

I have tried to uninstall (and remove preferences) and then reinstall...it did not solve the issue.

Help?