@David-TP Thanks David. I replaced the LAN cable as per your advise, and monitored for past 2-3weeks. It seems like the issue is resolved.

Hi Team, Here is my setup ISP modem --> XE75 (main) ---(wired)-> XE50 (Satelite ) Download/Upload: 500/100 After some days, the download speed reduced to 100mbps (speedtest ~90mbps) on the satellite...

@TP-Link My house is equipped with 2 units of M9 Plus. And always my Samsung TV gets connected (wireless) to the deco that is far away (in different floor).The nearest one is just sitting 3meters...