Assertion Failed - Crash when exit multiplayer (destroy session)

Hi, The Steam is working fine on Standalone launch type, achievements are working etc. But when I exit the multiplayer game, every button that has the Destroy Session on the blueprint, make the UE5.2 crash, here is the code I’m getting. Any tips or solutions? Thanks a lot, I really did not find a solution.

Assertion failed: SessionInfo->SessionType == ESteamSession::LobbySession [File:D:\build++UE5\Sync\Engine\Plugins\Online\OnlineSubsystemSteam\Source\Private\OnlineSessionInterfaceSteam.cpp] [Line: 631]

UnrealEditor_OnlineSubsystemSteam

UnrealEditor_OnlineSubsystemSteam

UnrealEditor_OnlineSubsystemUtils

UnrealEditor_CoreUObject

UnrealEditor_CoreUObject

UnrealEditor_CoreUObject

UnrealEditor_CoreUObject

UnrealEditor_CoreUObject

UnrealEditor_CoreUObject

UnrealEditor_CoreUObject

UnrealEditor_CoreUObject

UnrealEditor_CoreUObject

UnrealEditor_CoreUObject

UnrealEditor_CoreUObject

UnrealEditor_CoreUObject

UnrealEditor_CoreUObject

UnrealEditor_CoreUObject

UnrealEditor_CoreUObject

UnrealEditor_CoreUObject

UnrealEditor_CoreUObject

UnrealEditor_UMG

UnrealEditor_UMG

UnrealEditor_Slate

UnrealEditor_Slate

UnrealEditor_Slate

UnrealEditor_Slate

UnrealEditor_Slate

UnrealEditor_Slate

UnrealEditor_Slate

UnrealEditor_ApplicationCore

UnrealEditor_ApplicationCore

UnrealEditor_ApplicationCore

UnrealEditor_ApplicationCore

user32

user32

UnrealEditor_ApplicationCore

UnrealEditor

UnrealEditor

UnrealEditor

UnrealEditor

UnrealEditor

UnrealEditor

kernel32

ntdll

Having the same issue here.

Hi, I fixed the crash making some changes on the defaultengine.ini Try to delete some things unecessary. I can post my defaultengine.ini here later.

Now I’m trying to start session, for some reason, on the logs, the sessions failed to start.

Any news I come here to give you a solution. Never thought it would be so problematic to do the steam network play. At least there is no more crash.

By the way, not sure if I can play on steam acting like a host server on my country time here, will try later on the afternoon. My friend that lives on other location are also helping me. Let’s see and never give up :+1:t2:

Yeah, I’d be curious to hear if anyone has been able to package a build in 5.2 with Online Subsystem Steam plugin. I’ve heard of other alternatives but the native UE5 one seems to have a bug in 5.2

Having the same issue here in 5.2 steam subsystem.

It only happens when I quit the game session. It was happening when I joined the session when I had Steam Sockets enabled but after going back to default Steam subsystem it only happens on exit now.

Hey, have you got any success? Can you please share with us which parts you have changed in defaultengine.ini? I’m using 4.27 but having the same issue here. Thank you very much!

Same thing. The engine is crushing so badly that it freezes and I can not even check crash logs.

Anyone found the solution yet?

The same issue occurs in UE5.4 as well.
Is there any solution to this problem?