It used to be that mousewheeling over a GUI object with its Active property set to true prevented the camera from zooming, which was especially nice for custom scrolling frames and what not. The problem is for the past few weeks these active GUI objects haven’t been behaving like this, resulting in unwanted camera scrolling while trying to scroll through a menu. You can easily repro this on a blank baseplate by simply plopping any UI object into your PlayerGui and mousewheeling over it.
You can see the unwanted behavior below, that menu has its Active property set to true.
https://i.gyazo.com/331efcf73aebc4fc7ad5ad035c93a98c.gif