[4.4.dev7] OpenXRCompositionLayer - "Enable Hole Punch" breaks transparency

[arassec]

Tested versions

v4.4.dev7.official

System information

Godot v4.4.dev7 - Fedora Linux 41 - Pico 4 (OpenXR)

Issue description

When enabling "Hole Punch" in the editor, and setting a sort order of -1 as described in the manual (https://docs.godotengine.org/en/stable/tutorials/xr/openxr_composition_layers.html#hole-punching), transparency of the composition layer breaks:

With "Hole Punch" disabled:

With "Hole Punch" enabled:

Steps to reproduce

• open Godot Editor
  

• import openxr_composition_layers from the official demo projects
  

• configure "Hole Punch"
  

• start demo via godot in headset
  

Minimal reproduction project (MRP)

openxr_composition_layers demo project