I've been experiencing the same issue described above since I upgraded to v1.8. I found a handful of threads that discussed this issue but this one seemed to be the only one with an actual solution. I followed the instructions above but that sadly did not solve my issue. A couple things to note:
1. this isn't file specific; the issue is there for all my .NEF files.
2. This issue also coincides with a new Surface 7, but it's hard for me to understand how this could be an issue with the surface, given that like others, the preview in the navigation window is of the correct brightness/exposure.
3. My 32P settings are as they should be.
I appreciate any help I can get - thanks.