@Carl I have seen a few other people on here that have had the same issues with netgear.  I will try the ax thing tonight when I get home.  I dont know that it crashes it.  But if you run through the setup and it goes to connect to the system.  It will make the wifi on the router cycle on and off In the web ui.  And as soon as you reset or unplug the smart plug it will resume after cycling one more time.  I have tested this for about an entire day trying different solutions.  I love to link products and would really like to use these and not have to return.

@jasondabsher it crashes my ax3000 as well. Did you solve it?

Thanks!

I am having the same issue. Has anyone found a resolution? I've tried everything I can think of.

@ZacharyZSun 

@jasondabsher I am having this same issue with my ASUS Blue Cave wireless router. I get to the step where the plug tries to access the network and it crashed the wireless router. Very annoying. Any clue on what's happening?

@phiebing So this is interesting. I created a guest WiFi network on my router. I tried to connect that way. It didn't work, and now the plug has a solid amber light. BUT, it didn't crash the router, just the guest SSID. I cannot find the SSID anymore. Absolutely bizarre. 

@phiebing sorry guys I have still not figured out.  I forgot to return them to Amazon also so I still have them.  I gave up because it just frustrated me so much.  I know tp link wants to maintain that these could no way mess up my router but it will indeed break your wifi anytime you connect it to an ssid.

@jasondabsher 

So I have the exacxt same issue with a SR905ac router.  As soon as I plug the HS103, it crash my Wifi.  Any solution ?  Should I change this for another model/brand?

@CptKebec if you have the ability to return them and get something different i would if i were you.  i still have not getten them to work on my network yet.  i still cant belive they havent patched this or hotfixed it in anyt way

@jasondabsher Having about 30 Kasa devices, four Netgear WiFi routers, half a dozen Negear smart switches, & two Arris WiFi routers, my opinion is the router.  In my case, I have mostly older (10+ yrs) Netgear WiFi routers, which work fine with the Kasa devices.  However, Netgear has a PROVEN history of JUNK firmware, like the time they HARD-CODED the NTP IP address of a Univ. Wisconsin NTP server in one of their consumer network products (how STUPID do you have to be to do that???).  That overloaded the U. Wisconsin server, AND Netgear initially took no responsibility for it. My two Arris routers crash when I enable 5GHz support on both of them (the two channels are nowhere near each other, & the physical separation is about 80 ft).

As a software/firmware developer for 50 years, I can say that the quality of most consumer software/firmware out there, is just above the junk level, OR LOWER.

I have a couple TP-Link pocket/travel routers, & they work fine.  One further argument for using TP-Link routers, is that they are made by the same company that makes Kasa devices.  In the future, when I next need a a good WiFi router, I'm going to try a full TP-Link router.