Samsung Camera sometimes doesn't take a picture

When I hit the shutter release button, I want to take a picture. Period.

But sometimes the camera app doesn't do it. Instead, it makes a 'bong' sound and briefly zooms or refocuses, and ... no picture. What's happening when it does this? (And more importantly, how do I get it to stop?)

Thanks

Phone: Samsung Galaxy S9
Camera app: Version 10.5.03.18
Android version: 10

 

Thanks, but there doesn't appear to be an autofocus setting.

Done. But it didn't change anything.

Still perplexed...