I have the Deco M9 connected directly to my ISP Gateway Router. The M9 is configured in Access Point Mode. I have a verified 1Gbps upload and 1Gbps download. I currently do not have any other devices connected to the M9 and while doing the speed test through the Deco App I consistently get around 500 mbps download and 100 upload. If I connect my PC using the same network wire connected to the same port on the ISP Gateway Router I get 920-950 Mbps download and 920-950 Mbps upload. Here is a screen shot of my topography with the M9:
Here is the Speed Test Results:
Speed test from my PC:
I've tried changing to router mode and setting the QOS to 1000 Mbps for both download and upload and switching back to access mode and I get the same speed results. Has anyone seen this issue?