Black bars on side when rendering C4K footage

[Duke Sweden]

AHA! Found the problem. Posting it here for the benefit of others who are as dumb as I am. I was using proxy files that I had generated in Media Encoder, which have a different aspect ratio. At the time I didn’t know that Resolve also had the ability to generate proxies so I imported already created proxy files generated when I was using Premiere Pro.

Dell XPS 8920
Intel i7 core 7700 build
GeForce GTX 1050ti
32 Gigs of RAM
3 7200 RPM SATA Drives
Windows 10 64-bit
Premiere Pro CC 2017 v.11.0