I seem to have finally experienced the lag that everyone is talking about in its full might

Perdums

First, I'm sorry for my hysterical laughter, I forgot to turn off the micro.
Usually my game works more or less smooth, so I didn’t quite understand what people talking about on the forum. That had happened when I wanted to grind CoH2 for mask style, but after first run I just said: "No, thanks". It was really fun to watch mobs go round or stick in one place, you may also notice skill delays up to 3 seconds or skills that not working after first use.
Tbh it was the best run I ever had in this dungeon, but it also may be very frustrating when you try to do what you need in your free time.