@papashakur - Hold off doing anything!
Sadly, your system has a failing display cable issue FlexGate-Part II !! Your problem is the video ribbon cable breaking down.
What is the length of your AppleCare or AppleCare+ ?? Some countries laws give you a two year warranty or if you have AppleCare+ it will be cover under it.
You need to replace the entire display assembly the cables are not replaceable on their own as in the older models (bummer!)
If you end up paying for it to be serviced make sure you go to a Apple authorized service center or Apple directly so you can get a rebate on the cost once Apple gets enough complaints.
Do fight for getting covered using the backlight flexgate issue! Press them for a warranty exception! 13-inch MacBook Pro Display Backlight Service Program
OK so what’s it going to cost me out of pocket? $700-800 dollars OUCH!!
Here’s the cables:
The Pink marked cables are the ones that are damage in your case. They are part of the display assembly which is why you need a new display to fix this. This is exactly the same problem the stage light effect people have encountered as described here The design flaw behind the MacBook Pro's "stage light" Effect and you can even see it here YouTube - Apples 2018 McBook Pro's Attept to Solve Flexgate, Without Admitting It Exits
Again, your problem is a different cable from within the display assembly that these people encountered. In your case its the video feeds Vs the backlight cable that has become damaged.