### Godot version

4.1.1.stable, 4.2.dev (2282fc5de)

### System information

Arch Linux - X11 - GLES3 (Compatibility) - NVIDIA GeForce RTX 3060 Ti (nvidia; 535.104.05) - 13th Gen Intel(R) Core(TM) i5-13400F (16 Threads)

### Issue description

When using Compatibility renderer, adjusting the Alpha component of clear color affects 2D editor content.

This does not happen when using Forward+ or Mobile renderer. Does not affect 3D editor and the running game.


https://github.com/godotengine/godot/assets/372476/e398522e-590a-4832-959f-ea8ba8e71c5d



### Steps to reproduce

1. Create a project using Compatibility renderer.
2. Adjust the clear color's alpha component in Project Settings.

### Minimal reproduction project

N/A
state.canvas_instance_batches.clear();
		return;
	}
	
	glBindBuffer(GL_ARRAY_BUFFER, state.canvas_instance_data_buffers[state.current_data_buffer_index].instance_buffers[state.current_instance_buffer_index]);
#ifdef WEB_ENABLED
	glBufferSubData(GL_ARRAY_BUFFER, state.last_item_index * sizeof(InstanceData), sizeof(InstanceData) * index, state.instance_data_array);
#else
	
	void *buffer = glMapBufferRange(GL_ARRAY_BUFFER, state.last_item_index * sizeof(InstanceData), index * sizeof(InstanceData), GL_MAP_WRITE_BIT | GL_MAP_UNSYNCHRONIZED_BIT);
	memcpy(buffer, state.instance_data_array, index * sizeof(InstanceData));
	glUnmapBuffer(GL_ARRAY_BUFFER);
#endif
	glDisable(GL_SCISSOR_TEST);
	current_clip = nullptr;
	GLES3::CanvasShaderData::BlendMode last_blend_mode = GLES3::CanvasShaderData::BLEND_MODE_MIX;
	Color last_blend_color;
	state.current_tex = RID();
	for (uint32_t i = 0; i <= state.current_batch_index; i++) {
		
		if (current_clip != state.canvas_instance_batches[i].clip) {
			current_clip = state.canvas_instance_batches[i].clip;
			if (current_clip) {
				glEnable(GL_SCISSOR_TEST);
				glScissor(current_clip->final_clip_rect.position.x, current_clip->final_clip_rect.position.y, current_clip->final_clip_rect.size.x, current_clip->final_clip_rect.size.y);
			} else {
				glDisable(GL_SCISSOR_TEST);
			}
		}
		GLES3::CanvasMaterialData *material_data = state.canvas_instance_batches[i].material_data;