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I find that sometimes after an update my M3 headlights will be set too high and I get flashed. I just pull over somewhere level and auto recalibrate the headlights through the Service menu setting. This seems to fix the issue.
Are the cars that flash you low-lying vehicles (sedans, coupes) or all vehicles in general including bigger SUVs and trucks? That should give a clue if its just a slight level adjustment that is needed.