### 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)

Ref<StyleBox> style = theme_cache.normal;
	bool rtl = is_layout_rtl();
	int x_ofs = 0;
	float text_width = TS->shaped_text_get_size(text_rid).x;
	switch (alignment) {
		case HORIZONTAL_ALIGNMENT_FILL:
		case HORIZONTAL_ALIGNMENT_LEFT: {
			if (rtl) {
				x_ofs = MAX(style->get_margin(SIDE_LEFT), int(get_size().width - style->get_margin(SIDE_RIGHT) - (text_width)));
			} else {
				x_ofs = style->get_offset().x;
			}
		} break;
		case HORIZONTAL_ALIGNMENT_CENTER: {
			if (!Math::is_zero_approx(scroll_offset)) {
				x_ofs = style->get_offset().x;
			} else {
				x_ofs = MAX(style->get_margin(SIDE_LEFT), int(get_size().width - (text_width)) / 2);
			}
		} break;
		case HORIZONTAL_ALIGNMENT_RIGHT: {
			if (rtl) {
				x_ofs = style->get_offset().x;
			} else {
				x_ofs = MAX(style->get_margin(SIDE_LEFT), int(get_size().width - style->get_margin(SIDE_RIGHT) - (text_width)));
			}
		} break;
	}