I have resolved this problem.
I have found that on going to Mode Settings on the App the Disarm settings appear to be set to Motion detection and Live view. I turned these two functions off and the Disarm function now works as expected.
I have resolved this problem.
I have found that on going to Mode Settings on the App the Disarm settings appear to be set to Motion detection and Live view. I turned these two functions off and the Disarm function now works as expected.