Apple's support forum is seeing more and more messages from iMac 2020 users having problems with the screen. According to the users, stripes suddenly appear in the picture.
The responses show that it is the iMac 2020 with the Radeon Pro 5700 XT graphics card. This is the heaviest version. The stripes appear spontaneously in the image, without any reason to do so.
Apple has not yet responded to the screen problem. The American company from Cupertino is likely to come up with a solution soon. It does not appear to be a hardware problem. Apple could solve this with a software update.
The iMac 2020 has been available since the summer. The desktop has the same design, but with a more powerful processor and an improved screen.