I had same problem with 4.23 project that I recently upgraded from a previous project:
LogSpawn: Warning: UWorld::DestroyActor: World has no context! World: TestMap1, Actor: /Game/Multiplayer/Maps/TestMap1.TestMap1:PersistentLevel.REINST_TestMap1_C_0
Possibly related: I am loading maps using level streaming and it appears that I cannot get any of my maps/sub-levels to load.