Hi there, i have a 1Gbit interner speed from ISP and am able to get 450Mb/s when near the router and about 80Mb/s when about 15m away from the router. After connecting up my 2nd router in mesh mode, the speed drops to 50Mb/s. Ive used the app and verified that the 2 decos are set properly and the app shows the the 2 decos are working well. Ive tried placing the 2 deco in different areas of the house and even swaped the main and meshed unit. Everytime after I turn on the 2nd deco in mesh, the speeds will drop. Ive even tried to disable 2.4Ghz and run on 5Ghz only, disabled beamforming and tried changing to AP mode. 

Being in the same spot, internet speed always drops when activating the 2nd mesh. Please advice me what to do