Shader include with incorrect case in path will work in editor but fail to compile in release

Tested versions

Godot Engine v4.5.stable.mono.official.876b29033

System information

Windows 11, Vulkan 1.4.303 - Forward+ - Using Device #0: NVIDIA - NVIDIA GeForce RTX 3070

Issue description

Shader include with incorrect case in path will work in editor fail to compile in release

With error:

SHADER ERROR: Tokenizer: Unknown character #35: '#'
          at: (null) (:3)
ERROR: Shader compilation failed.
   at: (servers/rendering/renderer_rd/renderer_canvas_render_rd.cpp:1578)
ERROR: Parameter "version" is null.
   at: version_get_shader (./servers/rendering/renderer_rd/shader_rd.h:183)

Steps to reproduce

• Create a .gdshaderinc file
• Include it in another shader, but with some incorrect capitalisation
• It will work in the editor
• Export a release build
• Shader will not compile in release build.

Minimal reproduction project (MRP)

Attached.

Here Left.gdshader has correct path, but Right.gdshader has incorrect path (wrong case in Shader dir). Both work in the editor, but right will fail in release.

Shader-include-error.zip

Start with the attached Shader-include-error.zip and reproduce the difference between the editor and an exported release build using Left.gdshader and Right.gdshader. Trace how each build resolves the referenced .gdshaderinc path, then verify that an incorrectly cased include is handled consistently and that both shaders compile as expected.