My MacBook Pro 2017 screen has horizontal line

I am from India. I bought my laptop (2016 MacBook Pro 13-inch with Touch Bar) in May 2017. It's a little over a year old now. I have the same problem at the bottom of the screen. So here's what happens. I'm a designer, so I frequently use apps like Sketch, Adobe Photoshop, Adobe Illustrator, and so on. When I use regular apps like Notes, Safari, Chrome (which eats a lot of RAM, by the way), Spotify, and so on, simultaneously with multiple windows and desktops open, nothing happens, and everything has been fine for the first 10-11 months. Recently though, whenever I use the laptop for more than 3-4 hours with at least one window of Sketch or Photoshop or any design software open and in use, black lines start appearing at the bottom of my screen. They start faint, one or two, and with time, they become darker, with more lines appearing, until a point when it's a thick dark black band at the bottom of the screen (feathered/smooth edges, not sharp). And then they even start appearing on the top, but not to such an extent. My observation is that this has a correlation with graphics use and heating. The laptop gets very hot. (It gets hot when the bands appear, but the bands may not always appear when it gets hot otherwise, so it's not just the heating issue, it's more of a graphics issue). The photo attached herewith shows the issue at a stage when the bands have thickened. It looks translucent, but it's very opaque at its worst.

Your issue is different.

Try running Apple Diagnostics and see what it reports.

How to use Apple Diagnostics on your Mac - Apple Support

Then create your own Topic in this forum. You'll get more attention that way and it won't create cross-currents here.

Try an NVRAM reset:

How to reset NVRAM or PRAM on your Mac - Apple Support

Is this present in all screens or just in Launchpad?

Well, that progress. I can't see it in your new image.

Try NVRAM reset again, maybe a couple more times.

You're welcome.