You sound to have been ‘hit by’ the age old issue of motion detection on security cameras with a battery. They take time to wake up and can miss events.
It’s an issue that impacts all types of these cameras. That is why to be fair a battery powered security camera really should not be used in a vital area.
Yi produced a guide to try to assist getting the optimal placing of your camera
Take a look here > https://news.yitechnology.com/tips-tricks/where-to-place-my-outdoor-home-security-camera/
Usually the best way to capture detection via the PIR is to understand how the PIR works and ensure that the objects cut across the pir not directly to it. Make sure your camera is like on an angle to the subject area.
Brands such as Ring, Blink, Nest and Arlo are littered with similar concerns to yours.
Use the guide I have posted the link to and when you are installing it think like a criminal. And before you make the final choice on location test the detection then test again. And when you’ve done that test again to make sure you have the best possible detection possibility.
Some regard battery powered ‘security cameras’ as nothing more than toys. I’m not that harsh or blunt towards the technology but where I use battery powered devices of this kind I use them as monitoring tools and not mission critical security devices. If needed for that it’s always best to look at a wired system.