@friday18 

Hello,

I have recently bought the M9 plus Deco (2 units). I have a similar setup as you do i.e. main deco on router mode and the second unit running on AP mode presumably. While there is no problem with devices connecting to the main deco, the devices connecting to the seconday unit seem to fail randomnly. Same effect as you just described. So I am guessing this is a product / firmware issue more than anything. In my quest for a solution, I have come across many such topics in the support forum. So I am guessing this is indeed a product issue. Firmware version is 1.5.2 and it says thats the latest I've got. Not sure if there is anything else that we can do.

Btw..in one of the discussions, a gentleman added that by switcing to AP mode, this problem disappears. But that is not a solution but only a workaround as it robs away some of the key featurs of the router mode (Parental control, QoS control, etc.). Is there anyway we can get the attention of the Tp Link support team here? Surely, this is some product issue that needs to be addressed.