Disconnecting mid hunt

[Leo]

I keep disconnecting from SoS hunts midway trough. I join the hunt, no problems. We fight the monster, no problems. Then we get to the midway or 3/4 trough the hunt and the monster stays completely still and everyone is running on the spot before the error message shows up.

It only happens mid hunt, never at the start. I can play Safi-jiva siege without disconnecting at all, and hunts that I host no one disconnects.
I have turned off steam overlay, signed out of steam friendslist and added the -nofriendsui -udp and it got a little better for a while, and now this.. suggestions?

[Drummerx04]

I was experiencing similar disconnecting issues from SoS flares, Safi siege quests, and one of my Steam friends as well (also had issues joining certain sessions outright), but I could always play reliably with friends living in my town.

One of the common error codes was 227-MH1

I fixed the issue by changing my router "NAT Filtering" to "open" (was "secured") and ALL of my disconnect issues have thus far been resolved.

If you have UPnP on your router (most modern consumer grade routers have this), then you shouldn't need to forward any ports, or change any steam settings/launch options, but the NAT Filtering (apparently) can still ruin your night.