### Godot version

v4.2.dev4.official [549fcce5f]

### System information

Windows 10

### Issue description

`scene/main/node.cpp:1757 - Parameter "p_node" is null.` when attempting to type after using find function. Does not happen in 4.2dev3.

https://github.com/godotengine/godot/assets/3820082/4a2818f7-cc3b-4b46-a0b1-5bc6a85b4abc


### Steps to reproduce

1) Open any script in the script editor
2) Ctrl+F to select some text that exists in the script
3) Hit escape to re-focus the script editor without placing the caret
4) Attempt to type



### Minimal reproduction project

[find-mrp.zip](https://github.com/godotengine/godot/files/12555561/find-mrp.zip)

}
							if (rect.position.x < x_ofs) {
								rect.size.x -= (x_ofs - rect.position.x);
								rect.position.x = x_ofs;
							} else if (rect.position.x + rect.size.x > ofs_max) {
								rect.size.x = ofs_max - rect.position.x;
							}
							rect.size.y = caret_width;
							RenderingServer::get_singleton()->canvas_item_add_rect(ci, rect, caret_color);
						}
					}
					{
						
						if (ime_selection.y > 0) {
							Vector<Vector2> sel = TS->shaped_text_get_selection(text_rid, caret_column + ime_selection.x, caret_column + ime_selection.x + ime_selection.y);
							for (int i = 0; i < sel.size(); i++) {
								Rect2 rect = Rect2(sel[i].x + ofs.x, ofs.y, sel[i].y - sel[i].x, text_height);
								if (rect.position.x + rect.size.x <= x_ofs || rect.position.x > ofs_max) {
									continue;
								}
								if (rect.position.x < x_ofs) {
									rect.size.x -= (x_ofs - rect.position.x);
									rect.position.x = x_ofs;
								} else if (rect.position.x + rect.size.x > ofs_max) {
									rect.size.x = ofs_max - rect.position.x;
								}
								rect.size.y = caret_width * 3;
								RenderingServer::get_singleton()->canvas_item_add_rect(ci, rect, caret_color);
							}
						}