I'm not sure if this is common knowledge, but the phone is essentially taking pictures the entire time the camera app is open. Pressing the shutter button is merely selecting which photo to keep, and adding more post processing. This is done to minimize lag, which is important when trying to capture a moment, but uses a lot of power.
My main gripe with this approach has been that this causes the camera app to be incredibly RAM hungry, and my Safari tabs/Apps will reload when switching back to them. My 15 Pro seems a little better thanks to the increased memory, but the issue is still there.
Additionally, it's been relatively recently since iPhone captured at resolutions higher than 12MP, so that could explain why this phenomenon has gotten worse recently.
My main gripe with this approach has been that this causes the camera app to be incredibly RAM hungry, and my Safari tabs/Apps will reload when switching back to them. My 15 Pro seems a little better thanks to the increased memory, but the issue is still there.
Additionally, it's been relatively recently since iPhone captured at resolutions higher than 12MP, so that could explain why this phenomenon has gotten worse recently.