Editor (PIE) Crash Related to Replicating Actor

Hi. I’m getting this crash right at the beginning of PIE when simulating Multiplayer (no crash with only 1 player and no ded. server). Yesterday I was working on my project pretty much all day. At some point the crashes started and a couple of hours later it seemed they had stopped for no obvious reason at all… And now they are back. The actor to be replicated is most likely a player-character (default pawn). Help please!

This is the call stack:

Access violation - code c0000005 (first/second chance not available)

""

UE4Editor_Engine!SortInternal<FActorPriority * __ptr64,TDereferenceWrapper<FActorPriority * __ptr64,`UNetDriver::ServerReplicateActors'::`209'::FCompareFActorPriority> >() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\core\public\templates\sorting.h:108]

UE4Editor_Engine!UNetDriver::ServerReplicateActors() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\engine\private\networkdriver.cpp:2336]

UE4Editor_Engine!UNetDriver::TickFlush() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\engine\private\networkdriver.cpp:163]

UE4Editor_Engine!TBaseUObjectMethodDelegateInstance<0,UNetDriver,void __cdecl(float)>::ExecuteIfSafe() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\core\public\delegates\delegateinstancesimpl_variadics.inl:772]

UE4Editor_Engine!TBaseMulticastDelegate<void,float>::Broadcast() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\core\public\delegates\delegatesignatureimpl_variadics.inl:809]

UE4Editor_Engine!UWorld::Tick() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\engine\private\leveltick.cpp:1288]

UE4Editor_UnrealEd!UEditorEngine::Tick() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\editor\unrealed\private\editorengine.cpp:1347]

UE4Editor_UnrealEd!UUnrealEdEngine::Tick() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\editor\unrealed\private\unrealedengine.cpp:361]

UE4Editor!FEngineLoop::Tick() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\launch\private\launchengineloop.cpp:2427]

UE4Editor!GuardedMain() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\launch\private\launch.cpp:142]

UE4Editor!GuardedMainWrapper() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]

UE4Editor!WinMain() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.10\engine\source\runtime\launch\private\windows\launchwindows.cpp:200]

UE4Editor!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:264]

kernel32

ntdll