@Kevin_Z same issues. Just bought. Updated firmware to latest. Then it rebooted itself again.so far rebooted 4 times.

i am on a 1GBps subscription. First test over wifi on Iphone 11 Pro Max gave 800mb download spead. Now everything is half speed.

2.4ghz band speed seems limited to 40mb on dell latitude and 100 mbps on iphone

@sudipBiswas hey guys -- i was experiencing a SUPER stubborn issue, for about two months. I've attached two videos below, check them out.  The latter wound up working for me, not the initial one. Check your task manager, sort by network, and you might see something at the top, hogging all your bandwidth titled: Service Host - Network Service and then a drop down with Delivery Optimization -- this is what these two videos address for me.  I can only explain in laymen terms, but it seems this is some sort of peer-2-peer downloading service for Windows Updates that REFUSES to turn off even when manually turned off. These videos show some work arounds to turning it off and really ridding the bandwidth hogging.

initial link, works for most, didnt work for me: https://www.youtube.com/watch?v=iNE5kg1Stek&t=16s

secondary link, by same youtube user, worked for me (so far): https://www.youtube.com/watch?v=TnXlFyvJAbc&t=11s

might I add, it's only been about 24 hours since the workaround and i will report back if this change doesnt wind up working -- but usually by now the connection would dwindle down to about half the mbps from my ISP, and spike my ping frequently. for a while i thought the issue was random, even changed my wireless card thinking it had something to do with drivers...(waste of $17 feelsbad) -- however, i deduced it down to occuring the longer my computer was on. so mostly at start up, full bandwidth, but two hours after restart it had throttled to half, if i restarted it would go full, then 2hrs, etc

thanks for listening all, and i really hope i was able to help some of you!

@sudipBiswas Hello, i experiment exactly the same issue. I bought an ax50 router 2 month ago. Out of the box with my iphone pro 11 i have 400mbps of download bandwith, recently i update firmware to 1.0.8. Now in the same conditions my bandwith is capped to 200mbps, if i reboot  the router i get 400mbps during about 1 or to minutes then the speed slow down to 200mbps. Note i have no qos and no high priority device.

@sudipBiswas I have just installed the AX50 router 2 days ago and have updated the firmware to V1.0.8.

Have notice the upload and download speed are lower as compare to my old router (Asus AC56S).

When connected lan cable directly to the router port, the download speed is surprising slow (less than 150Mbps).

For my old router, when connected lan cable directly, I can get close to 500Mbps for both upload and download.

Is this normal for TP-link? My QoS is set to standard and have enabled the Antivirus.

@Ozone removing QoS, Prioritization and Parental Control from the web interface is a marketing decision from TP-Link just to request a payment subscription for those features in the future...