I noticed the same thing on my swift. Occasionally its annoying in gaming, mainly with overhead markers/text labels noticeable when I look around. I loaded up my laptop and looked for inversion there and noticed it was present as well just not as noticeable due to the size of the monitor. I am not sure if this is a Swift issue or a 27inch 1440 issue?
If anyone figures out how to resolve this I would be ecstatic because otherwise this monitor is great!
i7-4770k @4.2 | EVGA 780ti | Maximus VI Hero | Seasonic 1000W Platinum | Seidon 120v AIO
Trident X 16GB 2400 | Samsung EVO 500GB | Seagate Barracuda 2TB | CM 690 III
Logitech G400 Mouse | G710 Keyboard | Razor gaming headset
ROG Swift pg278q G-Sync Monitor