### 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 
if (selection.active && selection.from_frame && selection.from_line >= 0 && selection.from_line < (int)selection.from_frame->lines.size()) {
		
		float line_offset = selection.from_frame->lines[selection.from_line].offset.y;
		
		for (int i = 0; i < selection.from_frame->lines[selection.from_line].text_buf->get_line_count(); i++) {
			Vector2i range = selection.from_frame->lines[selection.from_line].text_buf->get_line_range(i);
			if (range.x <= selection.from_char && range.y >= selection.from_char) {
				break;
			}
			line_offset += selection.from_frame->lines[selection.from_line].text_buf->get_line_size(i).y + theme_cache.line_separation;
		}
		
		ItemFrame *it = selection.from_frame;
		while (it->parent_frame != nullptr) {
			line_offset += it->parent_frame->lines[it->line].offset.y;
			it = it->parent_frame;
		}
		vscroll->set_value(line_offset);
	}
}
void RichTextLabel::scroll_to_paragraph(int p_paragraph) {