@TP-Link before i got this m9, from the modem, i use Ethernet to m4 then connect wireless to the other m4 and e4. everything work well. no issue at all. Then i add the m9 and choose as main deco also...

@TP-Link i also have the same issue. i got a 1 pack m9 plus and after updating the fw to 1.5.1, the wifi signal is continuously dropped. the led is still green but wifi continuously disappeared and...