Hello, I need your help.

I have wsAP ac lite (Firmware - 6.43.4).
Speed from provider - 100Mbps, speed from ethernet port of wsAP to internet test sites - 100Mbps.
Wifi speed when use Bandwidth test to remote internet BTest server - also 100 Mbps.
WiFi speed to different internet test servers - only 15-20Mbps.

I try different settings but without success (