zoom shortcut broken
After Effects 17.5.1 (MacOS Catalina) still have Alt-scroll (zoom) functionality broken. I saw a post where Adobe Admin told that this issue was solved in 17.5.1 update, but it is not.
If I have a comp without a Camera layer, with my SelectionTool selected I can press Alt and scroll to zoom in/out. But if I have Camera layer (locked or unlocked), Alt key switches to camera tool and when I scroll I'm changing the depth.

This issue was resolved in After Effects 17.6.
In Preferences > 3D, the Mouse Scroll Wheel Behavior option defaults to Magnify Composition, instead of Dolly Camera.
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Amir Stone commented
Please go to Preferences -> 3D -> Camera Navigation - Dolly -> Mouse scroll wheel behavior and select Magnify Composition option. That should fix your issue.
The issue that was solved was when the Zoom tool is selected, holding the alt-key down would not zoom out and would instead activate the camera tool. This should be fixed.