Unable to reprogram power button with keymap editor or via XML file

Using both UR01-BLE and NVIDIA SHIELD Remote paired via BT, I cannot use the GUI editor as it just sends the shutdown command when it asks me for the input from the remote and I press the power button.

If I use remote.xml, whether just a snippet from the overall remote.xml file for the power button specifically or if I copy and paste the whole file over and edit the power button, it never works for whatever new command I give it instead of shutdown. Am I missing something about how this works?

I am using the “/storage/.kodi/userdata/keymaps” directory.