Hell,
I assume the template is being pushed, but the save is not happening? is this correct? If yes, since you are doing a parital config push using DHCP, on the switch for it to talk to Activate and Airwave has this config option in Group's Basic page, where it will only push the full template and reboot, when it is factory default. All you need to do is change the option to push the config in Yes mode, instead of factory-default only. This way it will push the config to all the devices, not just factory-default devices, as shown below, and once you make this change do, save & apply.
If this does not solve your problem, i will hightly recommend you to open a TAC case to troubleshoot the issue.
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