[Bug] in Canon R6 Mark II: AF Lock Issue with AF-ON Button Customization (Needs Firmware Fix!

[masilsnap]

I’ve been experiencing a very strange and frustrating AF lock issue on the Canon EOS R6 Mark II. This specific behavior is causing me to miss critical shutter moments during my shoots.

Summary of the Problem:

Settings: I have "Servo AF" assigned to the AF-ON button through the customization menu.

The Issue: After shooting a burst using the AF-ON button, the AF stays locked as if the shutter button is still being held halfway down, even after I completely release all buttons.

The Frustration: While this is happening, the multi-controller (joystick) becomes completely unresponsive, making it impossible to move the AF point to follow the action.

The Anomaly: Unlike the normal behavior of the touch shutter, the AF point stays green and refuses to return to its idle state (white) even after the subject is gone.

Note: The issue disappears immediately if I press the shutter button halfway, but in a live performance shooting environment, that tiny fraction of a second is enough to miss a decisive moment.

I'm sharing this video in hopes that it reaches Canon for a much-needed firmware fix. Has anyone else encountered this "sticky" AF behavior?

EOS R6 Mark II 

[shadowsports]

Greetings,

You need to contact Canon support so they can investigate this.  If it is an actual problem, posting about your issue here will do nothing.  The appropriate parties will never see it.

Start by registering your camera in your MyCanon account.  Then contact support. 

MyCanon https://share.google/rAnzZvJVvjqYzTzQn

Support telephone number 

1-800-652-2666

I understand you want your AF point to unlock.  Let support determine if this is an issue or something related to your configuration.

[xzebra]

I had a somewhat similar issue

"When using the Av mode - One Shot...regardless of one Spot AF, 1 Point AF or Expanded it does not lock onto the selection I choose on the joystick in the back for the focusing point.I am using BAF and don't have this issue with my RF 100-500mmAlso using Subject Detect to Auto - Eye Detectin AutoDoes not matter the AF setting."

https://u.pcloud.link/publink/show?code=XZ26pK5Z2Ltr1BTlcIYgb2sDVXcuK7DoDuDy 

Not sure what setting was causing the issue, but did some camera resets find a solution.

The basic reset did not work unfortunately, but did reset all other options in the "Other Settings" selection, EXCEPT "Root Certificate" and the "Custom shooting mode(C1-C-3).

This resolved the issue without losing my custom "C1-C3) settings which was awesome.

[Waddizzle]

“ 

Summary of the Problem:

Settings: I have "Servo AF" assigned to the AF-ON button through the customization menu.

The Issue: After shooting a burst using the AF-ON button, the AF stays locked as if the shutter button is still being held halfway down, even after I completely release all buttons. “

I agree with Rick.  A social media platform is not one reports bugs to a manufacturer.  I also doubt if your issue is an actual bug.  Your observations are consistent with camera being set to use One Shot AF, which locks focus.

Try not to fall into the trap of believing any camera behavior that one doesn’t immediately understand is automatically a bug.

[xzebra]

Canon is also not the ones to report the bugs/problem to.

I called 4 times with hours spent with no resolution on the issue I posed above.

Reddit was more helpful than Canon's own tech support which is a joke after spending thousands on equipment with a manufacture.  

[shadowsports]

Respectfully, that's a matter of personal opinion.  Reddit is full of "know it all's".  My experience with Canon support his been different.  I'm not defending anybody. I'm just pointing out that my experiences with them have been positive.  However, after working decades in software development and also owning technical support, I know that it's not always perfect.  

As more information comes to light, it's possible the behavior is related to configuration and not to an actual bug.  Maybe 🤔

In all fairness , I'd still recommend reporting the behavior to Canon.  

[Stephen]

It's documented that you called our team several times in one day, and they went over everything with you, including disabling eye detection and trying a different lens, since your 35mm macro was the one causing the problems. 

If their troubleshooting didn't fix the issue, and a different lens that works on another camera produces the same issue on your camera, then the next step is to send your camera and your lens to our factory service center so we can determine why your camera is doing what it's doing.

You can start the repair process by logging into your Canon Account at https://canon.us/account 

[xzebra]

While I fully understand sending it to Canon could have resolved...My camera was just one year past the warranty.  I also stated with one or two of the support groups that it would do the same on my RF 100-500. 

The tech on the phone said it would be $250-$450 pending on what is wrong with the camera.  This is a big expense when it was truly not needed.

Found a resolution on reddit for free.  I called simply as a customer needing knowledge based support from a manufacture that make's the camera with experts to help guide me.  Not shaming all the techs (some were amazing trying to assist), but some had very little knowledge how to correct the issue and also told me my C1-C3 settings would be wiped clean.  This never occurred during my process and resolution.

It is just frustrating as a consumer having the Canon brand in my hand for nearly 30 yrs from film to the first digital camera (300D, then 50D and 6d MK II) .  As trusted loyal owner of your cameras, lens and gear.

[Stephen]

I'm curious to know what resolution you found on Reddit that wasn't included in the support documentation and that our phone team wasn't aware of.

For what it's worth, our engineers can't fix "bugs" for products they never see in real life. We can't diagnose anything unless it's sent in. 

[masilsnap]

​Thank you for sharing your experience! It’s interesting that a deep reset of "Other Settings" worked for your case.

​I have also tried factory resets, but unfortunately, the issue persists. My case seems to be a bit different because it isn't a permanent setting error—it only happens temporarily right after a high-speed burst while using the Servo AF-ON button. The joystick only freezes during that specific "Green AF point" lock-up period.

​However, I appreciate the tip! It might help other users who are experiencing more permanent joystick glitches. I'll keep monitoring if any specific sub-settings in the "Other Settings" menu correlate with this behavior.