Odd noise at end of print

Lately, but not every time, when a print finishes, instead of the head going to X/Y home, it almost sounds like a buzzer/siren then it stops where it is at.

The head is not hung up on anything, and everything else seems just fine - but I'd like to figure out what is happening and why.  If it is a problem, I'd like to fix it before it gets worse.

Anyone else had this happen?  Did you fix it?  How?

Thanks!