
except I think you have it set wrong ?? you moved tracking sensitivity to fast

Read here. This has been the standard on the new AF systems since the 7D introduction. I dont think the R has changed.......https://www.dpreview.com/forums/post/41258784

For birding this was one of the MAJOR required settings for the 1D and 1D MkII.
It used to be only on 1D bodies in a separate set of settings that could not be done in camera, called "Personal Functions" IIRC.. anyway, this was a magic bullet for AF on my 1D2.