I used to use Open Camera, but I started having an issue where it would not take photos, and would just wait indefinitely for the camera to focus. It would completely lock up until I moved the phone somewhere else, pointed it at something, and waited and waited and waited for the camera to be happy about the focus, and only then would it take a photo. But this made it useless to get photos in most of the situations where I wanted photos. I couldn't find any documentation about this or settings about this; I must have gone through the entire settings tree at least five times trying to figure out why it was waiting for the camera to focus before taking a photo, but I could never figure out why, or whether it's possible to disable that.

You might have enabled the "Focus Macro" mode, which gives better pictures but requires a steady hand and patience