I noticed in the ZoomHandler.java file, it prevents zooming if the camera type is mirrored. Is there an issue with zooming when the camera is facing the player?

As you said, it's disabled by design. I make zooming in third-person possible by switching to first-person on zoom, so you don't just see the player's head when zooming. This doesn't work for mirrored third-person, because you would look behind you when zooming. I could also make the player not render when zooming, but I decided not to do that for now, to keep the code as simple as possible.

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