Furious FPV True-D firmware version 3.2 claims to eliminate white flash blanking in DVR footage. I’ve got before and after video so you can judge for yourself whether this is true. Personally, I think there has been a big improvement.
After I recorded this video, Furious released their own comparison. Here it is: https://www.youtube.com/watch?v=hIMSd6L-JnU&feature=youtu.be
Download firmware 3.2 here: https://furiousfpv.com/download.php
Project BlueFalcon has a great video showing how to upgrade the firmware here: https://www.youtube.com/watch?v=rXLOb5QaoGk