Would it be possible to deactivate the K2 with the app?

I went to the garage and tested, to make sure. Yes, this seems to be intentional, and proper operation. When you press the "capture" button Photo mode, it appears to do the same thing as tapping the red square "stop recording" button in Video mode.

So if you exit the app after snapping a photo, whoops, you've just stopped recording too, until the next time the K2 reboots.

Looks like it's a good habit to go back to the live video view & verify recording has resumed, before exiting the app. Slightly annoying, but a relief also. I was concerned that my K2 was misbehaving again.

Is this a "feature," or is my K2 not working properly?

Unfortunately this seems to be a feature. I experienced nearly the same. K2 was recording and I entered settings to check something. Then left the settings, but the K2 did not start recording after that. Happened witht the V67 firmware on my spare K2. Did not check it on my mounted K2, running V57.

Is it possible to unintentionally stop recording by taking a still photo within the app? I went on a ride yesterday and the K2 recorded perfectly all the way to my first stop (top of a mountain). I connected the app, went into Photo mode, and took a couple of pictures.

I exited the app, and assumed the K2 would resume recording. No. Upon reviewing the video at home, I found that it had not written a video file around the time I took the still photos, or any time after. Basically, it was as if I had stopped recording as described above. Only, I hadn't.

Is this a "feature," or is my K2 not working properly?

Thanks!

If the video is turned off from the APP, it is ok at present.

Just enter the APP and click record to turn it off.

The DVR won't record until you restart it the next time.