Steam connection

When the client join in the host game, can play, but two min before the client crash, if i try the same, but in “LAN” whitout steam, all work fine, what can be the problem?

Crash Error : Assertion failed: !bPostTickComponentUpdate [File:D:\Build++UE4\Sync\Engine\Source\Runtime\Engine\Private\LevelTick.cpp] [Line: 885]