Recently purchased the Archer AX11000 and have been enjoying the great WiFi range and speed for internal network devices, but I seem to have discovered an issue with the maximum upload through the WAN

Here is the problem. I have 400/400 Mbps from FIOS. I am able to get the full speed using wired connection. but for wireless connection on either Wifi 5 GH band 1 or 2, I am getting 400 mbps download