I have a 250mpbs internet connection, but It seems that I can't get above 150mbps from WIFI to WAN but I can WIFI to LAN.
I can get the full bandwidth of my ISP WIFI > LAN > router to ISP but WIFI > WAN > router to ISP only 150mbps.
To reproduce, connect via Wireless 5G and plug WAN port into lan side of internet router (I know it's multi natting this way but it shows the problem). In this configuration I cannot get more the 150mbps using Speedtest.net. If I move the WAN port from VLAN 2 to VLAN 1 so it's on the lan side in same configuration, speed test shows full throughput.
The OEM firmware works fine in this configuration and since the WIFI is ok in the "LAN" configuration, it seems that it's an issue in the VLAN setup itself. The oem firmware is a custom version Attitude Adjustment rc1 version of OpenWrt.