Firmware: Canon has released a minor firmware update for the EOS R3 | Canon Rumors

I’ll only be updating one of my R3s to the new firmware and see if they conveniently fixed the major IBIS problems both camera have since the last update. Err70 is also a problem I’ve been getting somewhat regularly (roughly once a day on long shoots).

Not sure if anyone else has the IBIS issue, but it’s on BOTH my cameras after the firmware. Using the RF 70-200 or 100-500 at longer focal length the IBIS will “walk” when you hold the shutter down. It’s always down and to the right. Best way to describe it is that the image frame starts to move down to the right as you hold down the shutter button. It then corrects itself when you release it. Happens randomly and I finally have some downtime to send one of the bodies in with the 100-500. Hopefully there will be an answer.