DJI Mavic 3 drone 5.1K D-Log mp4 video not working in Final Cut Pro 10.6.6/macOS Venture 13.4/Pro Video Formats 2.2.5

DJI Mavic 3 drone 5.1K D-Log mp4 video not working in Final Cut Pro 10.6.6 or macOS Venture 13.4 or Pro Video Formats 2.2.5. Updated all those (plus Motion and Compressor) this week and now 5.1K D-Log mp4 video will not play on my Mac. Just shows as black. I was editing video in FCP last weekend in same format with prior version of all those installed and all was fine.

Unexpectedly, if I record video in 4K in D-Log mp4 format it will display just fine. Also 5.1K mp4 in Normal (not D-Log) display correctly. Just 5.1K D-Log mp4 will not display anymore.

Only thing I was able to try downgrading was Pro Video Formats. I reinstalled Pro Video Formats 2.2.4 and that did not help.

Have of course also tried several restarts of my Mac. Any insights welcome.