NotImplementedException on ButtonAttribute when two methods share the same enum parameter name

[Tarteau tuto]

A NotImplementedException occurs when adding [Button] to a method with a return value and an enum parameter and adding ButtonAttribute to a second method (with or without return value) with the same enum and parameter name.

An example file is provided.

Tested with unity 2019.4.13f1 and Odin v3.0.1.0, Editor Only disabled, on Windows 10 v2004