Siri icon button next to spacebar button on keyboard not working

When using my IPHONE Reminders List application, my siri button next to the space bar on the keyboard no longer works. It does not light up anymore and will not retrieve siri  when pushed. This same siri icon button other the keyboard of other applications like messaging, notes, etc. still works. It's just quit working on the Reminders List.   Mind you, if I press the circular button below the keyboard it DOES work (the circular button on the face of the phone versus the icon on the keyboard to the left of the spacebar).

Last night, I added some third party applications (an art program) to my IPAD, not my IPhone, and I updated third party applications as well on my IPAD.  I was told that since I used the same apple's ID on the IPAD and IPHONE, the addition of the application could affect my iphone as well. Does anyone know how to get that icon button next to the space bar on my Reminders List to work again?