OnePlus stated that they were aware of the issue and were looking into it. At that time it was speculated that it could either be a software or hardware problem, where the hardware problem some had suspected that maybe their screens had been glued on backwards, but OnePlus has since come forward to state that the jelly scrolling effect is not a defect.
According to a statement issued to the folks at XDA, “The OnePlus 5 uses the same level of high-quality components as all OnePlus devices, including the AMOLED display. We’ve received feedback from a small number of users saying that at times they notice a subtle visual effect when scrolling. This is natural and there’s no variance in screens between devices.”
The company is stressing this is not a QA or manufacturing defect and that it is “natural”. This sounds like OnePlus doesn’t seem to think it is an issue, so it looks like there will be no software update that will fix it, nor will there be any exchanges, so we guess you’ll just have to deal with it.