@Sunshine Sorry for the delay. Life got busy. The latest version firmware version is dated 2017! But I downloaded and installed it and it seemed to have made no difference to this issue. I am...

@Sunshine I have tried that before and it has not made a difference

My Android phone's connection to the internet via my Powerline device (I have a TL-WPA8730 Kit) seems sluggish. It is strange because when I do a speedtest the speed seems fine, I get around 30Mbps...