Here is a little video about the visual glitch. I have noticed it only in phpstorm or webstorm. But I gave my new mac to a service. The service did not find any problem, but they will change the display (they think that this may help)... But may be this is not a macbook problem? Maybe this is a phpstorm/webstorm problem? The video contains two slow-motion moments.
Here is a screenshot:
And here is a video of one moment in natural speed:
The video and screenshot were taken by a phone camera.
P.S. Use dropbox app to watch video normally. On the website it renders only a half...
The file names, uploaded by a webform:
VID-20190819-WA0011.mp4 (10.1 mb)
VID-20190819-WA0010.mp4 (3.9 mb)
IMG-20190819-WA0009.jpg (49 kb)