Have you experienced this type of behavior?

My loved one is in memory care. Recently, he became obsessed with water in his bathroom. He believes it is necessary for him to keep the faucet running all the time while he watches it. He does not want to leave his room because this is so important to him. He gets upset if someone flushes the toilet for him because, again, he wants to monitor all the water. Is this behavior familiar to any of you?