HSM Stuck in "Arming Away" with Delay

So for the past few months I've used "Arm Away" with a 360 second delay in HSM, and has worked flawlessly every time. However, it now just gets stuck into "Arming Away" and never goes to Armed Away. I have tried shortening the time to 5 minutes delay, and it still gets stuck. Interestingly I have tried 15 seconds and it successfully arms away. I have not had time to try any other time delay intervals yet. Seems this started happening sometime within the last few weeks, as I have been keeping up with the frequent updates so I am not sure if there is a bug or not? If i go into the HSM App and watch the timer countdown during Arm Away, when it gets to zero, it then goes into a negative count and never arms.