From the information you shared, it seems your controller is at 6.5.4.9 code.
Do we have vpdn pool configured on the controller?
Is there any specific reason the controller is at Aruba OS 6.5.4.9?
Is there any possibility to upgrade the controller to Aruba OS 8.6 code ?
If it's your test setup, please upgrade the controller to 8.6 and test it.
I have seen similar behavior but once after the upgrade of controller issue gets fixed.