Do you use a Mac? Try to disable GPU performances (in the preferences)
Unfortunately it's a Win10 machine with an Intel Iris GPU
How much RAM?
Are the file and any placed files local or on a network?
Does it only happen in a particular document, or with any/all documents?
Have you tried rebooting?
I agree with John, probably a ram issue. If you scroll up and scroll back down does the copy realign. If it does then most likely a Ram issue.
is this a placed link file like ai or pdf? or this a text frame or table?
have checked the preview? i suggest to close the application and re open the file again.