Disconnects every game on EU region

Technical Support
1

Hello,
Recently the game has been unplayable for me. Every game disconnects atleast once, sometimes I can get disconnected multiple times per game. I contacted support, they told me to check the forums because the issue has to be on my end. Here on the forums I found alot of similar issues.
The funny thing is the Diablo 4 works perfectly fine, it’s ONLY Hearthstone that has this issue. No other game, application or device in my network experience problems.
I’m convinced the issue is not me, my network or my PC but rather something on blizzards end that decides to kick players of the EU server.
This is what I’ve tried to resolve the issue:

  • Verify install files
  • Reinstall network drivers
  • Restart router
  • Plug PC straight into ISP modem instead of router
  • Disable local firefall
  • Disable router firewall
  • Enable/Disable UPnP
  • Restart router
  • Set new local IP adress on PC
  • With/without VPN
  • With/without DNS filtering functions (Pi-hole)
  • Reinstalled the game 4 times on 4 different drives
  • WiFi/Ethernet - both disconnects in the same manner

I’ve ran multiple diagnostic tools in which I’ve found nothing indicating when the disconnect occurs, here is a list:

  • Jitter test - No indication of jitter during games or disconnects
  • Ping test - No indication of ping-spikes or problems when game disconnects
  • ISP health check monitor in Ubiquity - No indication of ISP issues during disconnects
  • Wireshark recording during game - No indication of missordered or missed packets during gameplay and disconnects
  • Checked DNS block list in the Pi-Hole - No blocked DNS records related to battle.net or Hearthstone at all. (I’ve alos ran the game without DNS filter, issue persists)
  • PC eventlogs - No indications of issues during game or at time of disconnect
    I would be willing to run tests and provide logs to blizzard to get this resolved but it seems to me that they are either unwilling or unable to do anything about these connection related issues.
    Regards,
    Benjamin
1 Like
2

Same. It seems to be anything blizzard with my iPad, but my pc runs everything but HS without a hitch. HS crashes almost every game though on PC and is completely unplayable on my iPad for the last week or so.

3

I’ve had the same issue for the last couple of months. The game is basically unplayable. I tried all the same things you did, plus the suggestions from this support article: https://eu.battle.net/support/en/article/000099037. Changing the realm to US doesn’t help either.

4

Hearthstone netcode is very old and bad so this mean that if connection is not perfect game have alot of problems keeping the game alive.

Now about the problems i dont know but considering there are alot of players still playing, that means the problem is not global , so can be blizzard , can be your isp, but can be everything between them (backbone) not owned by them .

So if you know how to do it , you have to find the ip hearthstone.exe connects to and use something like pathping to find what happens in the path between.

edit: clearly this is only to track the issue down if it is somewhere there , not sure someone will help you later

5

I’ve done this. Used wireshark to track the IP. Then do jitter and pingtests towards those IPs while the game is running. When the game disconnects there is no indication in loss of traffic or packets. Believe me when I say I’ve checked everything I know to check on a network and nothing indicates an issue. Something server side is not happy with certain clients and blizzard need to help us figure out what that is.

6

Just had a DC, I was about to make a play, and when I reconnect already opponents turn and he made the play I was gonna prevent. So yeah I lost a game because of Blizzard.

7

Exact same issue here. Tried EVERY fix, connection was even checked by my ISP. Definitely Blizzards fault. Affects every Blizz game btw, Diablo 2 Resurrected is unplayable, constant disconnects in Diablo 4.