"didEnter" and "didExitRegion" is not calling continuously

Hello All,

I’m using two beacons for my project in iOS. Till yesterday, “didEnter” and “didExitRegion” were calling continuously. For suddenly, since morning i’m unable to call it continuously and didn’t change any code also. Due to which i cannot move forward and achieve my desired output. Whereas for Android it is working fine. I have turned ON both location as well as bluetooth. Anyone has any idea whats wrong?