### Godot version

4.0.stable.mono

### System information

Windows 10, NVIDIA RTX 2060 (Driver 30.0.14.7284), Vulkan 1.2.175 Forward+ (Editor)

### Issue description

When changing certain Global Shader Parameters (in this case, a mat4) in the Project Settings, the value sent to the editor 3D view appears to be undefined, resulting in garbage values sent to the shaders.

As an example here, I'm using a mat4 to describe global light directions for a lighting shader
Note that the shader receives a different value even when the editor is being set to the same values
https://user-images.githubusercontent.com/44537737/222551889-b7c7ca63-ef65-484c-818f-c6ce47a7d3c0.mp4

Setting the global parameter from a script does pass the correct value to the shaders
![image](https://user-images.githubusercontent.com/44537737/222552338-14582898-a76d-4ec4-b877-7b822e414901.png)

I have also determined the shaders in the editor also do not get correct values from the `project.godot` when loading the project.

### Steps to reproduce

- Create a Global Shader Parameter of mat4 type (Project > Project Settings... > Shader Globals)
- Create a shader that visualizes the value of the mat4 (`global uniform mat4 global_mat`)
- Attempt to modify the global in the same Project Settings menu, the shader will receive garbage values

### Minimal reproduction project

[GlobalShaderParameters.zip](https://github.com/godotengine/godot/files/10875801/GlobalShaderParameters.zip)

}
									}
									if (tk.type != TK_PARENTHESIS_CLOSE) {
										_set_expected_error(")");
										return ERR_PARSE_ERROR;
									}
									new_hint = ShaderNode::Uniform::HINT_RANGE;
								} break;
								case TK_HINT_INSTANCE_INDEX: {
									if (custom_instance_index != -1) {
										_set_error(vformat(RTR("Can only specify '%s' once."), "instance_index"));
										return ERR_PARSE_ERROR;
									}
									tk = _get_token();
									if (tk.type != TK_PARENTHESIS_OPEN) {
										_set_expected_after_error("(", "instance_index");
										return ERR_PARSE_ERROR;
									}
									tk = _get_token();
									if (tk.type == TK_OP_SUB) {
										_set_error(RTR("The instance index can't be negative."));
										return ERR_PARSE_ERROR;
									}
									if (!tk.is_integer_constant()) {
										_set_error(RTR("Expected an integer constant."));
										return ERR_PARSE_ERROR;
									}
									custom_instance_index = tk.constant;
									current_uniform_instance_index_defined = true;
									if (custom_instance_index >= MAX_INSTANCE_UNIFORM_INDICES) {