If Optifine sees that its zoom keybind shares a key with another keybind -- even if that other key has a modifier -- it will remove that key from the keybind. Ex 1: I have a keybind mapped to "c" and ...

When logging in all Modifiers are stripped from keybinds. Unable to map a Modifier to keybind after loading in either. Example 1: CTRL+1 is bound to an action once logging in the mapping is reverted ...