It's probably just the same object issue we all posted about. Just use Kekpuker's script and add this to your
engine.ini:
Code:
[/script/engine.garbagecollectionsettings]
gc.MaxObjectsInEditor=2000000
gc.MaxObjectsInGame=2000000
gc.MaxObjectsNotConsideredByGC=0
gc.ActorClusteringEnabled=True
gc.BlueprintClusteringEnabled=True
gc.MultithreadedDestructionEnabled=1
gc.TimeBetweenPurgingPendingKillObjects=30
gc.NumRetriesBeforeForcingGC=0
gc.MinDesiredObjectsPerSubTask=2500
I'm mostly certain you'll be able to play, moving between maps and all.