Bought an R5 this year, came with 1.5 by default. Multiple freeze/crash on the maiden voyage.
Got a replacement still crashed. Updated it to 1.5.1 as advised, and still got a freeze. Returned it. Great camera, AF, IQ--love it. But this is Canon, and it's a $4000 camera.
I contacted support and they told me to send it to them and they'll have a look. It's not even a week old--they should replace it immediately. I know there is a supply chain issue and I have this maybe irrational theory that not all cameras are getting the standard chip or processor that is why there are some cameras that are having issues.
I know most people probably don't have issues with the R5--but this issue exists. And I also see that it is present in the R3 as well.
This is unacceptable especially for wildlife/bird photographers. Canon has to get their SHIZ together.