PS4 network error?

I've had a PS4 for a few days now, so not really long, and actually everything works as it should. However, when I'm in a party, the message "leave party due to network error" keeps coming up. Then I have to join again in the party and everything is as before. I have a 50k line, so this should not be a problem. But why is it that keeps throwing me out of the party? Btw I'm connected via LAN cable and have the NAT type 2.

Try to change your nat type.

That has helped me.

Here's also a tutorial for it:

Do I have any disadvantages as a result? Have read that the NAT type 1 should be unsafe than the 2 Series.