The article is a bit misleading. This has been the way camera control has worked since it was launched. iOS 18.2 adds an option to turn it off for the first time.
I immediately turned it off, as I want the camera button to always do the same thing no matter what.
I think the default behavior is the worse behavior honestly, since it makes camera control inconsistent: sometimes it requires 2 presses, and sometimes just 1. Especially if you’re pulling the phone out of your pocket at the same time you’re opening the camera, it’s pretty much a crapshoot: will the motion of the phone wake up the screen before I press the button or not?
If you’re like me and don’t have an issue with accidentally opening the camera, I recommend turning the Require Screen option off. Otherwise, I would actually recommend the option in camera control settings to always require two button presses. This reduces the chance of accidental activation while allowing you to still have an action that does the same thing every time.