Siri will not stop timer alarms.

When I say "Siri set a timer for 15 minutes." She says "15 minutes starting now, ... When the timer end simply say "Siri Stop" ." Well when the timer goes off, I say "Siri Stop." But here's the punch line... Siri just says, "There is nothing to stop." and if i say "Siri stop the timer," She says, "There are no timers set." I am sure That you can understand how frustrating that is. I get so upset that I have come close to throwing my macbook Pro across the room. And believe me, i have everything up to date on Iphone, Macbook, and Apple Watch!