Very poor throughput on RB260GSP to Amazon FireTV devices.

Both Firestick 3rd gen and FireCube 2nd devices only get 22Mbps throughput when connected to the RB260GSP running 2.13 software. However if I bypass the RB260GSP and connect directly to the RB5009UG+S+ throughput jumps up to 89Mbps. Both the RB5009UG+S+ and RB260GSP report the link speed as 100. The RB260GSP shows no errors on the interface connected to the Amazon devices. The RB260GSP is still running factory configuration, I have not enabled any VLANs or other features of any kind. Any idea or help on my this managed switch is performing so poorly would be appreciated.

Thanks
Andrew