I have the same problem, actually. F65 Raw (lite) files load fine, but the SR files do not appear in the Media Browser at all. Scratch will load them fine on the same computer, but neither Resolve nor the Sony SR viewier will see these particular mxfs. I have also loaded OK them in Baselight at a different location. In my case, I have SR 444 16bit lin clips copied off the SR memory card. I suspect it’s a 16bit issue.
DB