I have this same issue but with my 24-70 tamron f2.8. It doesn’t happen when using it on my D3 body, just in the r6. It works ok when I use 2.8 but any other aperture causes the error.
Hey Trevor! Did you ever get this figured out? I’m having the exact same issue, right down to the unique issue where it doesn’t throw the error when zoomed at the way out or at the largest aperature.
