My Face ID on the X did that. It was in my pocket during a torrential downpour. It got wet, and had to be replaced. Fortunately, it was covered under AppleCare.

Since you are running Beta software, you need to ask the Apple Beta Support Team.

If you have a z-wave hub, then there are z-wave key fobs you could use to trigger a routine to flash lights, start a chime, or any other smart device.