Three days ago I noticed a little bit of a bug with my RF 50mm 1.2 lens. When using it on an EOS R with firmware 1.4, it got into a weird mode where the focus limiter switch acted like the AF/MF switch. Intermittently, with the AF/MF switch set to AF the whole time, the lens would go into manual focus mode when the focus limiter switch was moved to the limited focus range, and it would go into auto focus mode when the limiter switch was set to "full."
Weird bug. It only acted like this for a minute, and hasn't happened since. Just putting it out there in case anyone else has run into it.
And before anyone asks, yes, I didn't mix up the two switches. When I initially noticed the camera had gone into manual focus mode, I looked at the side of the lens and was really surprised to see the switch still in the AF mode. But, I usually keep the limiter switch set to full, and I think at some point I had accidentally flipped it to the limited mode, so I flipped it back to full, and that's when I noticed that the lens went back into autofocus mode.
Weird bug. It only acted like this for a minute, and hasn't happened since. Just putting it out there in case anyone else has run into it.
And before anyone asks, yes, I didn't mix up the two switches. When I initially noticed the camera had gone into manual focus mode, I looked at the side of the lens and was really surprised to see the switch still in the AF mode. But, I usually keep the limiter switch set to full, and I think at some point I had accidentally flipped it to the limited mode, so I flipped it back to full, and that's when I noticed that the lens went back into autofocus mode.