@TP-Link I have the same problem, installed deco m9+ yesterday (2 pieces - one still pending install).

Every 14s my network stream (on my windows 10 PC) was lagging..

I tried to globally disable roaming, but it didn't worked...

I think I solved it by disabling mesh only for the PC that was lagging. I also added it to the QOS as high priority... but the mesh disable for the device was the solution.

Hope it helps...

Regards

@oller I have thwe same issue. Ping spikes every 5-10 sec.

In my case it was Firefox causing it.

When closing Firefox ping is normal.

I run Firefox for some hour or a day, the the spikes begins again.

I dont know how to fix Firefox from doing this.

@TP-Link 

Is there already an update on this matter?

I recently bought the Deco M9's and regretting it already due to these ping spikes. Can't seem to find the solution for it..

Gaming is impossible..

@oller Same problem, always lag spikes every 20-30 sec, anyone received a solution from tp link?

@tp link plz fix this, the interruptions are making me doubt to keep the deco m9 

@TP-Link 

is there already a solution? because nothing seems to work then to return in to the store if it doenst work.

I hope u have discovered the problem.

same ping issues with the wifi of my new 3 deco m4.
With lan cable the ping is stable.

I desactivated my PC from the QoS favorite List but nothing changed. Firmware is updated.
Should I try to activate the bridge mode of my own router?

Help @TP-Link Team!

 

I have the same problem.  Several M9 Pluses and a couple of M5s.  Utterly useless.  Cannot do video calls, gaming for the kids is rubbish.

I've been battling this for months and am now out of warranty.  I am so angry about how much I have spent on this kit and how utterly useless it is that I think it will end up in the small claims court - a UK thing where you can sue for breach of contract very cheaply and easily. 

It doesn't matter to me whether it's a wifi ping thing, or a windows 10 scan thing - the base technology ought to be able to handle it.  The denial from TPLink on other forums is amazing!  "Average pings are fine" - errrr 5ms 5ms 5ms 4000ms 5ms is NOT OK.

This product is simply not fit for purpose as it stands.

@TP-Link hi. I having regular ping spike. I follow your step but still same problem

ping to google.com

this are my setting

@TP-Link IT DOES NOT WORK, i have the same issue, frequent lag spikes and it's crazy bad, cannot play any online game, you need to fix this ASAP, it's a shame that I spent hundreds of euros in the Deco system and it's so shitty.

In any case my setup is the following:

Deco M9 main unit connected to the modem

Deco M9 satellite connected to the main one

PC connected via ethernet to the deco M9 satellite

Software version 1.5.1

FIX IT NOW