A problem that has plagued OnePlus One handsets is its touchscreen. There have been many fixes released in the form of firmware updates, but the problem is back as seen in the video above. The new Android updates could be the culprit of the issue showing back up. OnePlus One has posted on their own forum that they are aware of the issue and will be working on a firmware update to resolve this. Opo stated that they are working with Synaptics to figure out the problem. We don't yet have a date of when to expect the update, but Opo says the update will come soon.
via OnePlusOne Forum