### Godot version

4.0rc1 gl_compatibility only.

### System information

Windows 10, Nvidia 527.56 RTX3090, gl_compatibility
OpenGL API 3.3.0 NVIDIA 527.56 - Compatibility

### Issue description

Assigning a `CanvasItemMatrial` with `blend_mode = BLEND_MODE_SUB` in opengl causes the entire editor to turn black and break, even if later unassigned.

In case it matters, I'm using Single Window Mode in the editor.

### Steps to reproduce

1. Open the attached Project. Make sure it is using **Compatibility** on the top right.
2. On the root "Level" node, click the `Use Standard` checkbox which runs the tool script (it actually sets a CanvasItemMaterial, not standard. the checkbox was badly named). The editor turns black.
3. Without moving the mouse, click again to toggle this material off and return to a ShaderMaterial. The editor is still black / broken.
4. Press Ctrl-S to save the scene so you aren't bombarded with an invisible save dialog.
5. Close the editor.

If you edit the script and try other blend_mode values, this issue does not happen.

### Minimal reproduction project

[black_screen_test.zip](https://github.com/godotengine/godot/files/10689627/black_screen_test.zip)

CanvasLight *cl = canvas_light_owner.get_or_null(p_rid);
	ERR_FAIL_COND(!cl);
	cl->shadow.enabled = p_enable;
}
void RasterizerCanvasGLES3::light_update_shadow(RID p_rid, int p_shadow_index, const Transform2D &p_light_xform, int p_light_mask, float p_near, float p_far, LightOccluderInstance *p_occluders) {
	GLES3::Config *config = GLES3::Config::get_singleton();
	CanvasLight *cl = canvas_light_owner.get_or_null(p_rid);
	ERR_FAIL_COND(!cl->shadow.enabled);
	_update_shadow_atlas();
	cl->shadow.z_far = p_far;
	cl->shadow.y_offset = float(p_shadow_index * 2 + 1) / float(data.max_lights_per_render * 2);
	glBindFramebuffer(GL_FRAMEBUFFER, state.shadow_fb);
	glViewport(0, p_shadow_index * 2, state.shadow_texture_size, 2);
	glDepthMask(GL_TRUE);
	glEnable(GL_DEPTH_TEST);
	glDepthFunc(GL_LESS);
	glDisable(GL_BLEND);
	glEnable(GL_SCISSOR_TEST);
	glScissor(0, p_shadow_index * 2, state.shadow_texture_size, 2);
	glClearColor(p_far, p_far, p_far, 1.0);
	glClearDepth(1.0);
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
	glCullFace(GL_BACK);
	glDisable(GL_CULL_FACE);