### Godot version

4.0.dev (c309de53997feff3286295fb2d71657f112a15db)

### System information

Linux, Nvidia, Vulkan

### Issue description

Editor segfaults when certain conditions are met when using the AnimationPlayer editor.

### Steps to reproduce

1. Create multiple animations, saved into a animation collection
2. Open an existing animation, then make a new empty animation
3. Change from seconds to fps, or add a new property to animate ()
4. Editor crashes

NOTE: It is slightly random and I have not found a perfect repro

### Minimal reproduction project

N/A (TBD?)
_redraw_tracks();
	_redraw_groups();
}
void AnimationTrackEditor::_update_step(double p_new_step) {
	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
	undo_redo->create_action(TTR("Change Animation Step"));
	float step_value = p_new_step;
	if (timeline->is_using_fps()) {
		if (step_value != 0.0) {
			step_value = 1.0 / step_value;
		}
		timeline->queue_redraw();
	}
	undo_redo->add_do_method(animation.ptr(), "set_step", step_value);
	undo_redo->add_undo_method(animation.ptr(), "set_step", animation->get_step());
	step->set_block_signals(true);
	undo_redo->commit_action();
	step->set_block_signals(false);
	emit_signal(SNAME("animation_step_changed"), step_value);
}
void AnimationTrackEditor::_update_length(double p_new_len) {