I have found a concrete solution to the lag that causes many streamers the issue of the stream lagging when a stream is occurring and have written a small solution paper to address the solution.

Twitch Stream Lagging Solution

If you a gamer many people are engaged in streaming on one of the platforms
for gaming such as twitch. The focus of this article is to hopefully provide an

insight into an issue which many people find after they’ve been streaming for
a bit. Consider this, you finally got your status as paid in twitch and you’re

starting to get money in your account and than it starts to happen. Your

stream begins to lag every time that your on it.

 You become really concerned, begin to do all your research on it.  What 

really bites is that your dad perhaps or even you just got that new pc installed

and your thinking to yourself, how could this be? So you begin to make all

normal troubleshooting moves with twitch. Your using Streamlabs Obs, most
likely, or twitch studio, you check all the settings for streaming, changing the

recommended settings you find on every article on streaming and lagging

that you find on the internet.

 Here is the issue, the solution lies in the connectivity, windows 10 has 

different upgrades since windows 7 & windows 8. One of those upgrades is

Windows has built into it a set of algorithms that automatically choose

which connection is best for your use on the network. For example, if your

used to using ethernet cable, you might be surprised to find out when your

gaming and you begin to lag. To cut to the chase, I was researching this for

my son’s issue and here is where the rabbit hole took me.

On my home system which is with Cox network 1 gb connection because

we’re both into gaming and streaming, I checked the router logs and found

that the IPv6 which is the wi-fi was getting wan-attacks on the firewall logs.

Wan stands for “wide area network”, and the numbers were significant, at

least between 1500-7058, on a daily basis. When there was “black ice” on

windows side, and also Linux ubuntu, there was a few programs that would

identify the ip address from where the attack originated. I found out that a

a lot of them originated from China and the orient.

I m going to weave this to relevance now, what has been happening is that

windows will switch your connection from the ethernet to the wif-fi network

connection and so what happens is that your busy streaming and it begins to

lag, and you want to quit. It can be quite , maddening and to say the least

frustrating, because you thought that you had a solid connection, at least

thats what your paying for right ?

 So we go back to the windows command shell, cmd at the search field in 

windows and type the command “ipconfig” and it shows that our ethernet is

disconnected, but the wifi does show a connection. Heres the thing, your

connections to your network shifted to the wifi instead of the ethernet

connection you have directly via ethernet cable to the router. You can thanks

windows metric algorithms for changing your connection automatically.

   The reason for the lag is that most folks in the US are being attacked on 

wifi networks on a daily basis at some point in the day you can look at the

router logs and see the attacks on the network. Yes the firewall will block

them however, it will still have the effects of causing lags when your playing

your favorite games, and Streaming to your favorite platform, like Twitch.

 The solution to this dilemma is to in the windows 10 search field on the 

task bar, type in wifi. It will take you to the settings tab when you click on it

where you can simply turn off the wifi connection manually and it will stay

off, so that you can just use your static internet connection you created in

your network adapter, instead of your wifi connection. So at this point ,

your lagging issue will go bye bye, happiness will return as well as the

money for streaming and all will be well.

 The attacks will probably continue as Korea and China are still training 

their army of hackers , so the rule of thumb here is to sidestep your troubles

and stick to using your ethernet cable connection to your router, and use a

static IP address for your gaming connection or for that fact any other type of

work I as a business that connects to the internet .

 Else-wise, one will find themselves vulnerable to the continuing attacks.

On a side note, if the wifi doesn’t show up in windows 10 you have to go

through a few additional steps, such as opening device manager, finding the

wifi driver listed, right click and choose, update driver, and choose search on

your machine. Once that is done choose the driver it finds on your machine

most likely it will show intel and also Microsoft. I choose Microsoft,

because the driver on wifi was showing intel, and the wifi on my son’s pc

was not showing up in the network connections. After this then , hit

“scan hardware for changes” on the little icon in the menu area ..After this

open the task manager up and highlight windows explorer and restart it.

 After doing this you will notice in the taskbar that the wifi does now in

fact show up and you can manually click on it to turn it off so that your

connection to the internet will be thru your ethernet cable to your router.

 I wrote this because my son asked me to write him a text so he could 

check it before he starts his computer for gaming , lol. I hope this has been

helpful and of course check your streaming settings if you’re feeling that

could be the cause, and by all means check to see which connection your

gaming is actually using !

                                                  By Joyingaming