A7Sii Dual Record - files not identical

[Jake Kostelnik]

I'm not sure if I have settings wrong in the Sony A7Sii that I am using, but when I use the dual record feature, the low-res MP4 video files are out of sync with the 4k XAVC files by up to 10 frames, making the use of those MP4 files as proxies counter-productive to efficiency. Is there any way to ensure the synchronization of the MP4 files with the XAVC files? I understand this feature is useful for having "dailies" but if it could save me the time of creating proxies out of my XAVC footage at the beginning of the post process, that would be infinitely more useful to me.