Expected behaviour

Use opencv to do picture output, hope it can be stable output for a long time

Actual behaviour

I am now using opencv to output images, and I find that after running for some days, the output images are not very stable. On a same screen, the previous picture shows a part, the last picture shows a part.I use code cv.imshow cv.waitKey

Steps to reproduce

• cv.imshow cv.waitKey
• ubuntu20
• e.g. x86
• opencv-python 4.x