Alarms during workout sound early, can’t be cancelled

My Fenix 5 has recently started displaying an issue whereby if an alarm is set to fire and I am mid-workout (i.e. on a run or ride, etc.) then the alarm will begin firing two minutes early. Due to the fact the alarm is going off early it is impossible to cancel as microseconds after canceling it fires again. 

It is only once the true time of the alarm is reached that it can be cancelled. 

I have tried deleting the alarms, and restarting my Fenix without any change to the way this bug exhibits.