Screen Flickering and mirroring upper part of screen

What is wrong with my MacBook Pro (15-inch, 2016) Touchbar?

After a week of using it intensely for zoom meeting (08:00 - 16:00) with breaks, suddenly my lower screen flickers and mirroring the upper screen.

Processor : 2,7 GHz Quad-Core Intel Core i7

Graphics : Radeon Pro 455 2 GB

Intel HD Graphics 530 1536 MB

Please Helpp!!