Korkkiruuvi, do you have HERE maps installed on your device?

> I remember earlier version of this application there wasn't any kind of this lag.

I wonder if it was v2? In v3 there are much more graphical effects being used in the UI. The target being modern Android devices (and SW) -> no idea why your xperia would show significant lag, except something in the Sailfish OS xperia port perhaps causing it.

Br,
Heikki