Problem with upgrading FortiGate from FortiManager

We are in the process of updating our FortiGates from version 7.0.12 to 7.2.7. We are using the Firmware template in FortiManager, which is running version v7.2.8-build1634 241018. Every time we attempt to update our FortiGates using FortiManager, we encounter errors. The update progresses to version 7.2.6, but then fails during the second job. Has anyone experienced a similar issue and possibly found a solution?