Act 2 Map Lag

When i'm at the River Crossing i'm lagging so hard.. can't attack monster it's like i got a high ping but when i'm going to a other map it's all fine just the River Crossing got that problem is really weird.

I don't get it either. Through Act 1, I haven't dealt with any spikes of either fps or latency. I've really enjoyed the game until I got to Act 2 and then it has suddenly become almost too bad to enter combat sometimes. I went back to other areas and messed with my settings but it just seems like Act 2 for some reason.

I've had this as well.

I've only reached the town in act 2, but certain maps seem to lag me out.

In act 1, everywhere was fine except the mud flats, where I consistently experience huge lag spikes.
So far in act 2 it was the initial forrest area before you reach the town.

Hopefully the rest of act 2 will behave, but I'm a bit wary. I want to say the issue is just outdoor areas, but the beaches and cliffs areas in act 1 were fine for me. The only linking factor I can see is ... trees?

Just to be sure:

What you call "lag", is framerate drops, right?

Because "lag" means internet connection.

Which would mean that certain maps somehow make you lose packets, or increase your ping, which doesn't make any sense.

I tried using the PackCheck and immediately got an error in trying to read the Content.ggpk so I redownloaded the file and it seems to be playing much smoother. No severe clipping or anything yet.

EDIT: Explored more of Act 2, and it has been a better playing experience since I redownloaded. Not as perfectly smooth as Act 1 was for me, but definitely an improvement.