### Godot version

v4.0.beta15.mono.official [4fa6edc88]

### System information

Linux, Xorg

### Issue description

The entire window loses focus if you ungrab focus from a Control. 
This doesn't seem to happen in Beta 14 and older betas.

### Steps to reproduce

1. Create a Control that can grab focus (tested with LineEdit and TextEdit)
2. Grab focus
3. Release focus via release_focus() or hiding the node

### Minimal reproduction project

[FocusMinimal.zip](https://github.com/godotengine/godot/files/10498175/FocusMinimal.zip)

if (keycode == Key::NONE) {
					keycode = (Key)physical_keycode;
				}
				_get_key_modifier_state(xkeyevent->state, k);
				k->set_window_id(p_window);
				k->set_pressed(keypress);
				k->set_keycode(keycode);
				k->set_physical_keycode(physical_keycode);
				if (!keysym.is_empty()) {
					k->set_key_label(fix_key_label(keysym[0], keycode));
				} else {
					k->set_key_label(keycode);
				}
				if (keypress) {
					k->set_unicode(fix_unicode(tmp[i]));
				}
				k->set_echo(false);
				if (k->get_keycode() == Key::BACKTAB) {
					
					k->set_keycode(Key::TAB);
					k->set_physical_keycode(Key::TAB);
					k->set_shift_pressed(true);
				}
				Input::get_singleton()->parse_input_event(k);
			}
			memfree(utf8string);
			return;
		}
		memfree(utf8string);
#else