### 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
xi.relative_motion.y = 0;
				if (mouse_mode == MOUSE_MODE_CAPTURED) {
					pos = Point2i(windows[focused_window_id].size.width / 2, windows[focused_window_id].size.height / 2);
				}
				Ref<InputEventMouseMotion> mm;
				mm.instantiate();
				mm->set_window_id(window_id);
				if (xi.pressure_supported) {
					mm->set_pressure(xi.pressure);
				} else {
					mm->set_pressure(bool(mouse_get_button_state().has_flag(MouseButtonMask::LEFT)) ? 1.0f : 0.0f);
				}
				mm->set_tilt(xi.tilt);
				mm->set_pen_inverted(xi.pen_inverted);
				_get_key_modifier_state(event.xmotion.state, mm);
				mm->set_button_mask(mouse_get_button_state());
				mm->set_position(pos);
				mm->set_global_position(pos);
				mm->set_velocity(Input::get_singleton()->get_last_mouse_velocity());
				mm->set_relative(rel);
				last_mouse_pos = pos;
				
				
				
				
				if (focused) {
					Input::get_singleton()->parse_input_event(mm);
				} else {