Multiplayer Crash end-of-day when game tries to trigger a cutscene

[serene plover]

Title:
Reproduction Steps:

• Person 1 completed silver cave
• Person 2 went underwater fishing unlocking 2 altars
  Repro Rate: How often does the issue occur? 100% so far
  In-Game Date & Time: 17/1 22:30
  Players & Platform: Host (Me)[PC], Friend 1 (PC)
  Game Version: PC v1.2-1239
  Input Mode: Keyboard & Mouse
  PC Specs:
  --dxdiag output attached below--
  Attachments (if available):
  Crash log file

EpicAccountId:

Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x0000000000000018

ProjectCoral_Win64_Shipping!UC_CutsceneSubsystem::ProcessCutscene() [F:\TC\d165a1c44e0e0f0\ue4\ProjectCoral\Source\ProjectCoral\Subsystems\CutsceneSubsystem\C_CutsceneSubsystem.cpp:692]
ProjectCoral_Win64_Shipping!UC_CutsceneSubsystem::OnFadingStateChangedForPlaying() [F:\TC\d165a1c44e0e0f0\ue4\ProjectCoral\Source\ProjectCoral\Subsystems\CutsceneSubsystem\C_CutsceneSubsystem.cpp:1561]
ProjectCoral_Win64_Shipping!UC_CutsceneSubsystem::execOnFadingStateChangedForPlaying() [F:\TC\d165a1c44e0e0f0\ue4\ProjectCoral\Intermediate\Build\Win64\ProjectCoral\Inc\ProjectCoral\C_CutsceneSubsystem.gen.cpp:274]
ProjectCoral_Win64_Shipping!UFunction::Invoke() [F:\P\UE4.27-plus\Engine\Source\Runtime\CoreUObject\Private\UObject\Class.cpp:5680]
ProjectCoral_Win64_Shipping!UObject::ProcessEvent() [F:\P\UE4.27-plus\Engine\Source\Runtime\CoreUObject\Private\UObject\ScriptCore.cpp:2018]
ProjectCoral_Win64_Shipping!TMulticastScriptDelegate<FWeakObjectPtr>::ProcessMulticastDelegate<UObject>() [F:\P\UE4.27-plus\Engine\Source\Runtime\Core\Public\UObject\ScriptDelegates.h:488]
ProjectCoral_Win64_Shipping!UC_CameraFadingSubsystem::Update() [F:\TC\d165a1c44e0e0f0\ue4\ProjectCoral\Source\ProjectCoral\Subsystems\CameraFadingSubsystem\C_CameraFadingSubsystem.cpp:540]
ProjectCoral_Win64_Shipping!FTimerManager::Tick() [F:\P\UE4.27-plus\Engine\Source\Runtime\Engine\Private\TimerManager.cpp:878]
ProjectCoral_Win64_Shipping!UWorld::Tick() [F:\P\UE4.27-plus\Engine\Source\Runtime\Engine\Private\LevelTick.cpp:1563]
ProjectCoral_Win64_Shipping!UGameEngine::Tick() [F:\P\UE4.27-plus\Engine\Source\Runtime\Engine\Private\GameEngine.cpp:1823]
ProjectCoral_Win64_Shipping!FEngineLoop::Tick() [F:\P\UE4.27-plus\Engine\Source\Runtime\Launch\Private\LaunchEngineLoop.cpp:4923]
ProjectCoral_Win64_Shipping!GuardedMain() [F:\P\UE4.27-plus\Engine\Source\Runtime\Launch\Private\Launch.cpp:178]
ProjectCoral_Win64_Shipping!GuardedMainWrapper() [F:\P\UE4.27-plus\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:137]
ProjectCoral_Win64_Shipping!LaunchWindowsStartup() [F:\P\UE4.27-plus\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:273]
ProjectCoral_Win64_Shipping!WinMain() [F:\P\UE4.27-plus\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:320]
ProjectCoral_Win64_Shipping!__scrt_common_main_seh() [D:\a\_work\1\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288]
kernel32
ntdll

DxDiag;

------------------
System Information
------------------
      Time of this report: 9/4/2025, 22:08:38
             Machine name: DESKTOP-NF49PBS
               Machine Id: {78DDAC07-BC4F-4F57-8154-31B1ADE4ACAE}
         Operating System: Windows 11 Education 64-bit (10.0, Build 26100) (26100.ge_release.240331-1435)
                 Language: English (Regional Setting: English)
      System Manufacturer: Micro-Star International Co., Ltd.
             System Model: Raider GE76 12UGS
                     BIOS: E17K4IMS.208 (type: UEFI)
                Processor: 12th Gen Intel(R) Core(TM) i9-12900HK (20 CPUs), ~2.9GHz
                   Memory: 32768MB RAM
      Available OS Memory: 32536MB RAM
                Page File: 22691MB used, 35444MB available
              Windows Dir: C:\WINDOWS
          DirectX Version: DirectX 12
      DX Setup Parameters: Not found
         User DPI Setting: 96 DPI (100 percent)
       System DPI Setting: 144 DPI (150 percent)
          DWM DPI Scaling: Disabled
                 Miracast: Available, no HDCP
Microsoft Graphics Hybrid: Not Supported
 DirectX Database Version: 1.7.3
   Auto Super Res Version: Unknown
       System Mux Support: Mux Support Inactive - Ok
           Mux Target GPU: dGPU
    Mux Incompatible List: 
           DxDiag Version: 10.00.26100.5074 64bit Unicode

------------
DxDiag Notes
------------
      Display Tab 1: No problems found.
      Display Tab 2: No problems found.
        Sound Tab 1: No problems found.
        Sound Tab 2: No problems found.
        Sound Tab 3: No problems found.
          Input Tab: No problems found.

--------------------
DirectX Debug Levels
--------------------
Direct3D:    0/4 (retail)
DirectDraw:  0/4 (retail)
DirectInput: 0/5 (retail)
DirectMusic: 0/5 (retail)
DirectPlay:  0/9 (retail)
DirectSound: 0/5 (retail)
DirectShow:  0/6 (retail)

---------------
Display Devices
---------------
           Card name: NVIDIA GeForce RTX 3070 Ti Laptop GPU
        Manufacturer: NVIDIA
           Chip type: NVIDIA GeForce RTX 3070 Ti Laptop GPU
            DAC type: Integrated RAMDAC
         Device Type: Full Device (POST)
          Device Key: Enum\PCI\VEN_10DE&DEV_24A0&SUBSYS_13241462&REV_A1
       Device Status: 0180200A [DN_DRIVER_LOADED|DN_STARTED|DN_DISABLEABLE|DN_NT_ENUMERATOR|DN_NT_DRIVER] 
 Device Problem Code: No Problem
 Driver Problem Code: Unknown
      Display Memory: 24286 MB
    Dedicated Memory: 8018 MB
       Shared Memory: 16268 MB
        Current Mode: 2560 x 1440 (32 bit) (240Hz)

[daring ocean]

Hi @serene plover , thank you for reaching out to us! Does the crash occur for everyone or is it only limited to the Host? And could you confirm if the game crash during end-of-day screen every time you trigger a cutscene during the day?

[serene plover]

Only me (the host) hard crashes, everyone else disconnects.

It only crashes at the end of the day, but it's a consistent crash.

We're not sure if it's because we completed the silver cave or because we activated the 2 altars in the bottom left of zone 5, or if it's because we have a pending house upgrade

But it's always at the end of the day.

Considering it's crashing in the call to the ProcessCutscene() functionI can only guess it's trying to trigger a cutscene related to one of those 3 states but somehow failing spectacularly.

However it's making progress impossible at the moment.

It's worth noting that the silver cave getting completed is done by player 2, not the host. The host bought the house upgrade the day before, and activated the 2 underwater altars

For what's it's worth as well, I did not see any cutscenes myself during the day when it crashes

[serene plover]

debug notes;

• skipping to the next day; No crash
• Completing silver cave (solo); No crash
• Completing 2 underwater Altars (solo): No Crash

(Currently testing just doing the 2 underwater altars + silver cave)

[serene plover]

• upping museum to 180 + 2 altars
• Mine + museum no crash

our running theory is that doing the 2 things at the same time caused a cutscene to get queued that was causing the crash

that or the fact the non-host triggered the water/iron cave cutscene while the host was doing underwater stuff

[serene plover]

doing the silver mine first, ending the day early and then doing the other stuff managed to get it un-stuck

[ripe knot]

I had the same issue with doing the silver mine and the host completing the first area of the ocean. It crashed twice, both times when we went to sleep

[light prairie]

Also experncing this

[daring ocean]

Thanks for sharing your findings and testing out the cause @serene plover , we'll keep it in mind as we continue to investigate the issue!

And @ripe knot , Just to follow up on your confirmation about completing the Silver Mine and the Se Pulu area at the same time—could you share a bit more detail on which player is completing which part? And if you could replicate the issue, could you record a video and send it here so we can take a closer look?

[ripe knot]

The host was the one completing the Se Pulu area and I was the second player (there were only the two of us) and was completing the silver mine. We tried a third time but did the two things on separate days (first the Se Pulu cleanup and talking to Ling) and it went to the end of day screens just fine that time. We tried to avoid any cut scenes the day we did the silver mine, but we ended up triggering one at the general store and it didn't cause any issue.