Group Bandwidth Reservation Balance 20

I cannot get group bandwidth reservation to work properly on a balance 20. With bandwidth reservation enabled it still seems to be a free for all and not reserving bandwidth.

I have 3 WAN’s enabled 2 of which have download bandwidth of Max 512kbps and upload of 128kbps. Third WAN is a 4G connection that can vary when available.

I have two subnets setup using VLAN 2 and 3, which are then defined in the user groups one as manager and one as staff.

The bandwidth reservation does not seem to take effect and I am not allocated the reserved bandwidth on either Staff or Manager networks when there is traffic on both.

Is there something I have missed?