Using public bathrooms was an issue for my little when the bathroom had a sensor flushing toilet. Not only was it scary to have the toilet flush when you were on it, but it interrupted her routine. She would get so upset that she didn't get to wipe before it flushed. It got to a point that when there was that kind of toilet she didn't want to go. We since have started to cover the sensor, let her do her thing and then uncover when she was finished. This allowed no pressure, plenty of time and for her to complete her routine, uninterrupted. Now that we know how to make it feel safe, she has no issues. 🙂