### Godot version

master ([06ccbfe](https://github.com/godotengine/godot/commit/06ccbfe8eec6e840db3df2360dc2804386f940b8))

### System information

PopOS 22.04

### Issue description

Sometimes the doc page is broken when the engine is closed and then restarted.
Closing the doc and opening it again fixes it.

![2023-05-27_22-15](https://github.com/godotengine/godot/assets/3624853/ed202a55-03e8-420a-bc1c-ccfc7f7cd02a)


### Steps to reproduce

- Open a documentation page for any node
- Restart Godot

### Minimal reproduction project

NA

EDIT : Added the commit hash @Calinou 
_stop_thread();
	MutexLock data_lock(data_mutex);
	if (current->type == ITEM_TABLE) {
		return;
	}
	ERR_FAIL_COND(p_image.is_null());
	ERR_FAIL_COND(p_image->get_width() == 0);
	ERR_FAIL_COND(p_image->get_height() == 0);
	ItemImage *item = memnew(ItemImage);
	if (p_region.has_area()) {
		Ref<AtlasTexture> atlas_tex = memnew(AtlasTexture);
		atlas_tex->set_atlas(p_image);
		atlas_tex->set_region(p_region);
		item->image = atlas_tex;
	} else {
		item->image = p_image;
	}
	item->color = p_color;
	item->inline_align = p_alignment;
	if (p_width > 0) {
		
		item->size.width = p_width;
		if (p_height > 0) {
			
			item->size.height = p_height;
		} else {