Annual Leave accrual - Pay Basis - Hrly Employees

On the 7th May I was processing the weekly pay for our 60 employees who are on an hourly rate of pay. MYOB decided to have a moment and shut down while this was going through to the ATO. I waited for 45 minutes before it would let me back into the system. After this occurrence i had to start again.  The next day I was informed by our employees that their annual leave accrual had dropped off and did not accrue for the week. This was not just one but all employees that it happened to. My questions to the group are   has this ever happened to anyone before? Does anyone know of any major upgrades that are happening in May? And I how would you rectify this?