I use MacBook Air (M1, 2020, macOS Monterey) and MX Master 3 for Mac.
What I wanted to do is customizing short cut key of MX Master 3 and using Blender(3.0).
So, I allocated "command + z" to one of the side buttons, but it doesn't work correctly.
When I hit the side button, Blender only recognized "z".
I tried other keys, and I noticed that Blender can recognize only one key at a time.
Also, I wanted to allocate "Shift" key, and it doesn't work, too.