Hey there Nade Magnet,
Thank you for reporting this issue.
We are sorry to hear you are experiencing "Lost Connection to Host" issue in Hell Let Loose, we understand how exasperating this problem can be.
Could you please try the steps we recommend in the article in the link below?
Lost Connection to Host[team17.helpshift.com]
Please make sure you try all the steps in the article and let us know if they're helpful.
Do let us know how you get on!
Regards,
Team17 Support