### 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)

menu_ctl->add_item(RTR("Right-to-Left Isolate (RLI)"), MENU_INSERT_RLI);
	menu_ctl->add_item(RTR("First Strong Isolate (FSI)"), MENU_INSERT_FSI);
	menu_ctl->add_item(RTR("Pop Direction Isolate (PDI)"), MENU_INSERT_PDI);
	menu_ctl->add_separator();
	menu_ctl->add_item(RTR("Zero-Width Joiner (ZWJ)"), MENU_INSERT_ZWJ);
	menu_ctl->add_item(RTR("Zero-Width Non-Joiner (ZWNJ)"), MENU_INSERT_ZWNJ);
	menu_ctl->add_item(RTR("Word Joiner (WJ)"), MENU_INSERT_WJ);
	menu_ctl->add_item(RTR("Soft Hyphen (SHY)"), MENU_INSERT_SHY);
	menu->add_child(menu_ctl, false, INTERNAL_MODE_FRONT);
	menu->add_item(RTR("Cut"), MENU_CUT);
	menu->add_item(RTR("Copy"), MENU_COPY);
	menu->add_item(RTR("Paste"), MENU_PASTE);
	menu->add_separator();
	menu->add_item(RTR("Select All"), MENU_SELECT_ALL);
	menu->add_item(RTR("Clear"), MENU_CLEAR);
	menu->add_separator();
	menu->add_item(RTR("Undo"), MENU_UNDO);
	menu->add_item(RTR("Redo"), MENU_REDO);
	menu->add_separator();
	menu->add_submenu_item(RTR("Text Writing Direction"), "DirMenu", MENU_SUBMENU_TEXT_DIR);
	menu->add_separator();
	menu->add_check_item(RTR("Display Control Characters"), MENU_DISPLAY_UCC);
	menu->add_submenu_item(RTR("Insert Control Character"), "CTLMenu", MENU_SUBMENU_INSERT_UCC);
	menu->connect("id_pressed", callable_mp(this, &LineEdit::menu_option));
	menu_dir->connect("id_pressed", callable_mp(this, &LineEdit::menu_option));
	menu_ctl->connect("id_pressed", callable_mp(this, &LineEdit::menu_option));
	menu->connect(SNAME("focus_entered"), callable_mp(this, &LineEdit::_validate_caret_can_draw));
	menu->connect(SNAME("focus_exited"), callable_mp(this, &LineEdit::_validate_caret_can_draw));
}
void LineEdit::_update_context_menu() {