### Godot version

4.1.1 stable

### System information

Windows 10

### Issue description

this is the default size loaded on startup 1024 which seems fine but it actually have loaded the default [2048] and ignored the size in project settings
![image](https://github.com/godotengine/godot/assets/53877170/c8c71de7-468a-487f-8e6c-dba1ce0f8fa5)

changing it now to any size will break it 
[2048]
![image](https://github.com/godotengine/godot/assets/53877170/3082ff09-b7d7-41f7-8fbb-813074a54135)

[512]
![image](https://github.com/godotengine/godot/assets/53877170/5ea4620f-52b5-4d0e-a5f5-747e777cd59d)


### Steps to reproduce

change 2d shadow atlas size in project settings while using compatibility renderer. 

### Minimal reproduction project

_
struct {
				float points[6]; 
				float uvs[6]; 
				uint32_t colors[6]; 
			};
		};
		uint32_t flags;
		uint32_t specular_shininess;
		uint32_t lights[4];
	};
	struct Data {
		GLuint canvas_quad_vertices;
		GLuint canvas_quad_array;
		GLuint indexed_quad_buffer;
		GLuint indexed_quad_array;
		GLuint particle_quad_vertices;
		GLuint particle_quad_array;
		GLuint ninepatch_vertices;
		GLuint ninepatch_elements;
		RID canvas_shader_default_version;
		uint32_t max_lights_per_render = 256;
		uint32_t max_lights_per_item = 16;
		uint32_t max_instances_per_buffer = 16384;
		uint32_t max_instance_buffer_size = 16384 * 128;
	} data;
	struct Batch {
		
		uint32_t start = 0;
		uint32_t instance_count = 0;