### Godot version

2992ffd25523cb8b3e0ef1b873c40115b8940178

### System information

Windows 10

### Issue description

Godot crashes randomly within a few seconds after project start when moving with the mouse.

![win_err](https://github.com/godotengine/godot/assets/52464204/1da28596-d95b-40f3-b32f-12219ec02c5d)

Started after recent merge of https://github.com/godotengine/godot/pull/67791.
I can confirm that reverting the pr fixes the crashes.

### Steps to reproduce

see desc

### Minimal reproduction project

N/A
keycode -= 'a' - 'A';
			}
			String tmp;
			tmp.parse_utf8(utf8string, utf8bytes);
			for (int i = 0; i < tmp.length(); i++) {
				Ref<InputEventKey> k;
				k.instantiate();
				if (physical_keycode == Key::NONE && keycode == Key::NONE && tmp[i] == 0) {
					continue;
				}
				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);