Cyclone - Map Disconnects

I've seen scattered reports of this issue but no real pattern, thought I'd share my experiences to help pinpoint it.

Symptoms

After using Cyclone in some maps:

- Latency monitor flatlines
- Damage no longer done to mobs, they will however still follow you around
- Mobs not engaged will not be visible
- Buffs don't time down, potions aren't consumed but spell effects still play
- Other players in the map don't move
- I appear to be moving and using abilities to other players exactly as I'm using them
- After 30-60 seconds the map will either resync and continue to play as normal or disconnect to login screen with "Abnormal disconnect: An unexpected disconnection occurred."

Other observations
- It will either constantly happen on a single map or not at all
- Might have a relation with chilling/burning ground, need more testing
- Does not happen outside of maps
- Only happens with cyclone, same character with Frenzy never has the issue
- Other players are using the same ISP, no other network traffic increasing latency

Gut feeling would be there is some bad interaction going on between ground effects and Cyclone, can anyone else try testing this out to confirm?

I have the same problem and loose a lot of maps that way.it happens often on higher lvl maps (70+).very sad to see when you get lucky to find a lvl 72 map loose ist that way...

I might try rolling a few 66 maps with ground effects to further test the hypothesis.

Just a pain when you get a 90+% quantity map, you either gimp yourself or have to roll different mods.

Bump for visibility.

cyclone=desync it is nearly same thing don't use multistrike and try to not run into doors

Just to confirm:

Cyclone = Game is nearly unplayable as my character dies every now and then due to sync issues.

Cyclone + Multistrike = complete clusterfuck as every single cyclone means sync issues and almost certain death on merciless -> 10% exp down -> stagnation

No point in playing until fixed tbh.

Yeah this is beyond desync though, that can be mitigated through careful play however this specific issue relates to disconnecting from the entire instance which at best is annoying and at worst leads to map wastage.

Just bumping this now that GGG are back in the office, done some more testing with it today (all my rare maps rolled with chilled grounds...) and it looks like it might not be related to Cyclone after all. Got the same issue trying Frenzy, thinking on it now I think this may have only been since I acquired my Bringer of Rain but it doesn't really make much sense.

Would appreciate input on this as the character is pretty much unplayable without using Chaos to hope I don't get ground effects.

Just some additional information on this, WinMTR to the instance server shows no packet loss or anything abnormal when these disconnects happen.

Tried fiddling around with the MTU on my NIC which seems to have had good results but more testing is required. Have set up wireshark to capture incoming/outgoing requests when the issue occurs to see it's a case of the server just no longer sending data to the client or the client not handling it correctly.

OK, some more information for GGG's network guy following further testing:

- Confirmed this only happens on one character, appears to be regardless of what skill is used or items equipped (Passive Tree: http://www.pathofexile.com/passive-skill-tree/AAAAAgEAAecEswUtEuEUIBRNGS4aOBpVG8gl3yftKaUt0jboNuk62ECgQzFHfkp9TdhOKk99UEdQUFFgVElXDVhjWfNbr14TXz9gS2EhZKNlTWaeZ6Bqk25pcH1yqXTteu982YBWgW-DOITZhO-HKYd2jHaMz5BVkc6ePJ65ns2iAKcwp4SsqrZBud277b6nwA_AGsbY0iHSTdSP1e3ZYd0N42rnUuw47w7vfPAf8i_z3fZI97760vzF).

- Only happens on maps with burning/chilled/shocking ground

- When the issue occurs, absolutely 0 packet loss to the instance server shown in WinMTR

- Analysis of the Wireshark logs indicate, in the words of my friend who is a network engineer with the ISP I'm using "everything continues normally, then one packet appears to be lost however the other end never sends a replacement despite the client continuing to ask for it, this explains why the gameplay freezes but others still see actions taken as normal. Client is waiting on the server stream's missed packet before you can put the lot together to replay it".

This certainly seems to line up with my experience as occasionally the game will resync and it appears to very quickly playback all the actions I would have taken in the client and then resume, however mostly it'll just crash back to login screen with "Abnormal Disconnection" in the client log.

I did a bit of tinkering around with the modem firewall and there is a bit of evidence to suggest that it may be causing the issue but the logs are pretty much nonexistent so I can't see if the server sent back some crazy packets which the firewall dropped. Happy to provide Wireshark logs etc to help nut this one out as might help identify a possible flaw in the client/server code? Would be pleased to get a response on this one.