### 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)

_update_context_menu();
				Point2 pos = Point2(get_caret_pixel_pos().x, (get_size().y + theme_cache.font->get_height(theme_cache.font_size)) / 2);
				menu->set_position(get_screen_position() + pos);
				menu->reset_size();
				menu->popup();
				menu->grab_focus();
				accept_event();
				return;
			}
		}
		
		if (k->is_action("ui_text_submit", false)) {
			emit_signal(SNAME("text_submitted"), text);
			if (DisplayServer::get_singleton()->has_feature(DisplayServer::FEATURE_VIRTUAL_KEYBOARD) && virtual_keyboard_enabled) {
				DisplayServer::get_singleton()->virtual_keyboard_hide();
			}
			accept_event();
			return;
		}
		if (k->is_action("ui_cancel")) {
			release_focus();
			return;
		}
		if (is_shortcut_keys_enabled()) {
			if (k->is_action("ui_copy", true)) {
				copy_text();
				accept_event();
				return;
			}
			if (k->is_action("ui_text_select_all", true)) {