We've fought with QoS setting quite a bit. Once issue we found is that the burst buffer can cause issues if not configured correctly in situations customer using 100% of bandwidth. We use 2x uplink and downlink rate and limits if 1x uplink and downlink limit. The issue cambium says is due to how burst buckets refill and allegedly improved in latest firmware but have not yet tested it.
I'd encourage you, whatever you try, test and verify it. We found our quite a few times we thought "this is working" to find an ap not configured right, a backhaul without qos setup right or just something that works differently then we would expect. Tim Amplex Internet Example overrides below for a 10 down 2 up plan with 500kbit high cap good for about 4 simultaneous calls. priorityPrecedence:1 hiPriorityChannel:1 hiPriorityDownlinkCIR:500 hiPriorityUplinkCIR:500 upLnkDataRate:2500 upLnkMaxBurstDataRate:5000 upLnkLimit:2500 dwnLnkDataRate:10500 dwnLnkMaxBurstDataRate:21000 dwnLnkLimit:10500
