I thought I would follow up on my repeated freezes of my R5 requiring me to remove the battery to restart. It was not related to the battery status (state of charge, R5 battery vs R vs 7DMII, etc), card I was using (SD vs CFE--I was using compliant cards ie Type B CFE and SD UHS-II), shooting mode, speed of shooting, temperature, or lens. I've used all Canon batteries, lenses, and adapter when these freezes occurred. I spoke with a Canon tech at phone support and he said I would need to send the camera in so finally 10 days ago I did. They called me a couple of times to get more info while they were working on it about the episodes but basically they could find nothing wrong with the camera and were not able to replicate the crashes. They decided to replace the motherboard anyway and I received it back yesterday. I went out to shoot last night with it and shot about 1500 pictures and typically in the past there would have been a 50-50 chance of having it freeze but things were fine. Cautiously optimistic but time will tell.
Catherine
Also when I talked to the Canon tech guy, he said that the camera keeps a log of all the times it crashes and the techs can see this when they examine it