I think I have narrowed down the problem. I still have not updated the firmware of the Deco X60. I had reset all decos and shifted them on my home, moving the one I originally had problems in bedroom...

@Rafh18 I have a question, if I install the beta firmware will it download it to all deco X60 from one connection? Also, I have a Deco M19 how will that work. If the beta version does not work can I...

@TP-Link I am able to download the beta for firmware but ther is some problem with the link to download the instructions on how to install it. Also, is this beta firmware stable? In case it does not...

@TP-Link I have swithced off the private wifi connection since my first post. When you say to change the DNS are you indicating to be done on the iphone as on a previous post to 8.8.8.8 or is there a...

@Rafh18 It has been two more days and I have not received any answer from TP-Link

@Rafh18 Another issue I also found was on my iMac. If I try a couple of times using Speedtest.net via web browser (safari) then suddenly after two or three times I get the same situation, no more...