When will continuity camera automatically switch on?

The following is found at the bottom of the page at macOS Ventura - New Features - Apple

8. Available on iPhone Xr and later. Automatic camera switching occurs when iPhone is locked, in landscape orientation, stationary, and with the camera unobstructed.

However, my iPhone is automatically switching into continuity camera when I am using my phone (unlocked and in portrait) and in a completely different location than my MacMini; the room below my MacMini. I am having to press "disconnect" every few minutes when it attempts to connect again.

So is this a bug or intended behavior?

I do have a program running (OBS) that can use my iPhone as a camera. I'm assuming this was what is making my iPhone switch into continuity camera. But this is not the stated functionality of continuity camera automatic switching. My MacMini shouldn't be able to control my phone like that, which is why I think the above reference states that it automatically switches under strict conditions (and ONLY then?).

It seems rather insecure if it is intended behavior, because a program can use my phone as a webcam when it isn't intended to be. Just poor security hygiene, especially because it is implied in the reference to be more secure than that.

For clarity, when will the continuity automatically switch on?