Sure, I'll add a toggle autofocus keybinding in the next update. Thanks for the request.
If the autofocus is having issues calculating the depth, the video stitching might be off. It's a bit of a hassle, but if you pause the video, there'll be depth numbers overlaid on the image. While the menu is hidden, hold the grip button, and then move the thumbstick up/down to adjust the depth until the numbers match what you'd expect in reality. That usually helps with most autofocus issues.