When doorbell is pressed Ipad will ring for 20 times before it wiil stop unless call is accepted or rejected and wiil not stop if I accept call on android phone. I am using latest apk version # 3.6.10

When Doorbell button is pushed Ipad will ring and keep ringing endlessly if I am not around to ether accept or reject call. Also even if I accept call on my cell phone Ipad wil keep ringing. Is there