"Alarm" plays at random times, no notifications, even silenced.

[Android Central Question]

I am having what sounds like it could be an alarm go off at random times. It happened a couple months ago, then stopped. Now is has happened two days in a row. The actual song is not one that is in my selection for ringers, alarms, or notficiation sounds. It also goes off when the phone is silenced! Which is the main concern. So, there is no evidency on why it happens, and I have nothing to go on to where it is coming from. I need help!!!

BTW, it has also happened on my wifes phone. At different times. Its not exactly on the hour, half, or quarter hours either. Completely random.

Please advise!

Phone: Samsung Galaxy S9+ (Also same as wifes).