In December 2019, Canon reported:
"It has been confirmed that when using the RF70-200mm f2.8L IS USM to perform AF shooting to capture a subject at close-range with the focus distance approximately set to the tele-end (200mm), the image may become slightly front-focused.
"New firmware with improved focus accuracy is scheduled for release in the beginning of January 2020"
This firmware, version 1.0.6, is now available and can be downloaded at:
https://www.usa.canon.com/internet/portal/us/home/support/details/lenses/ef/telephoto-zoom/rf-70-200mm-f2-8-l-is-usm?tab=drivers_downloads
"It has been confirmed that when using the RF70-200mm f2.8L IS USM to perform AF shooting to capture a subject at close-range with the focus distance approximately set to the tele-end (200mm), the image may become slightly front-focused.
"New firmware with improved focus accuracy is scheduled for release in the beginning of January 2020"
This firmware, version 1.0.6, is now available and can be downloaded at:
https://www.usa.canon.com/internet/portal/us/home/support/details/lenses/ef/telephoto-zoom/rf-70-200mm-f2-8-l-is-usm?tab=drivers_downloads