I've noticed after making edits (main image) the navigator image appears richer in color/edits (notvce how navigator orange is deeper than main, more washed). And when exported, the exported image is closer to the navigator image than the main image.. any way to fix this issue? I find myself now looking at the navigator for final product/more accurate export than the main image
Following is not (I think) the cause of your current problem, but it will become a performance issue as you increase the number of photos in a current post processing session. That Camera RAW CACH limit if 5 GB (default value) will be way too small. Might want to bump up to say 20 GB for a start. Mainly effects performance in Develop.
Tried both (purged cache and updated to 20gb) also turned on smart previews, neither got both previews to match. only thing that seems to affect it is turning off the graphics processor.. maybe LR not up to the m1 graphics yet? idk, im not that technically incline lol