S2721DGF, overshoot, inverted ghosting

Hello! I have bought the S2721DGF monitor a week or so ago and so far am very happy with it, except for a couple of tiny reasons. The screen is connected to 2017 Sapphire RX580 Nitro+ via the DP cable that came with it, latest drivers, latest Windows version.

Issue one: overshoot/inverted ghosting around the mouse cursor when moving it (a faint white fog-like "cloud" around it when moving).
Issue two: faint smudges around object on white/bright backgrounds (like forum avatars) when scrolling.
Issue three: very faint smudging in bottom corners of the screen (just right next to the bezels) when scrolling.

Turning off Smart HDR was supposed to help, but nothing changed. Results are the same with FreeSync on and off. Response time is set to fast as I am aware that going higher might cause some more serious and visible overshoot. This is my second unit as the first one had to be returned due to a poor build quality. I'd appreciate any help here, this was bit of an investment for me so I would prefer to resolve these issues rather than to return the monitor and buying new unit/other model.

Thanks in advance.