Runtime exiting level freeze

Hello, I have a very specific issue, when I try to go back to my main menu level, from the normal ingame level, the game freeze for about one minute on this log:

[2016.09.09-19.12.44:003][509]LogExit: GameNetDriver IpNetDriver_0 shut down

then after one minute, it finally goes back to the main menu level normally. This is quite odd as the loading of the heavy playing level takes about 5 seconds in comparison. This issue happens in solo as well as in multiplayer. Maybe I have to disconnect or reset something, but I haven’t found anything by searching yet. Any ideas or pointers?

The Full log when I execute open map:

016.09.09-19.12.43:824][508]LogPackageName: SearchForPackageOnDisk took 0.176s to resolve MainMenu.umap.
[2016.09.09-19.12.44:002][509]LogPackageName: SearchForPackageOnDisk took 0.175s to resolve MainMenu.umap.
[2016.09.09-19.12.44:002][509]LogNet: Browse: /Game/Levels/MainMenu
[2016.09.09-19.12.44:003][509]LogLoad: LoadMap: /Game/Levels/MainMenu
[2016.09.09-19.12.44:003][509]LogNet: World NetDriver shutdown IpNetDriver_0 [GameNetDriver]
[2016.09.09-19.12.44:003][509]LogNet: DestroyNamedNetDriver IpNetDriver_0 [GameNetDriver]
[2016.09.09-19.12.44:003][509]LogExit: GameNetDriver IpNetDriver_0 shut down
[2016.09.09-19.13.54:352][509]LogMemory: Platform Memory Stats for Windows
[2016.09.09-19.13.54:352][509]LogMemory: Process Physical Memory: 2270.24 MB used, 2925.13 MB peak
[2016.09.09-19.13.54:353][509]LogMemory: Process Virtual Memory: 3635.79 MB used, 4407.99 MB peak
[2016.09.09-19.13.54:353][509]LogMemory: Physical Memory: 9979.49 MB used, 16328.30 MB total
[2016.09.09-19.13.54:353][509]LogMemory: Virtual Memory: 4286.72 MB used, 134217728.00 MB total
[2016.09.09-19.13.54:353][509]Allocator Stats for TBB: (not implemented)
[2016.09.09-19.13.54:908][509]LogAIModule: Creating AISystem for world MainMenu
[2016.09.09-19.13.54:908][509]LogWorld: Game class is ‘BP_FireStarterGameMode_C’
[2016.09.09-19.13.54:931][509]LogWorld: Bringing World /Game/Levels/MainMenu.MainMenu up for play (max tick rate 0) at 2016.09.09-21.13.54
[2016.09.09-19.13.54:931][509]LogWorld: Bringing up level for play took: 0.001699
[2016.09.09-19.13.54:932][509]LogGameMode: Warning - PATHS NOT DEFINED or NO PLAYERSTART with positive rating
[2016.09.09-19.13.54:933][509]LogSpawn:Warning: SpawnActor failed because no class was specified
[2016.09.09-19.13.54:935][509]r.SetRes = “1280x720w”
[2016.09.09-19.13.54:935][509]r.VSync = “1”
[2016.09.09-19.13.54:935][509]r.PostProcessAAQuality = “6”
[2016.09.09-19.13.54:935][509]sg.PostProcessQuality = “3”
[2016.09.09-19.13.54:935][509]sg.ShadowQuality = “3”
[2016.09.09-19.13.54:936][509]sg.TextureQuality = “3”
[2016.09.09-19.13.54:936][509]sg.EffectsQuality = “3”
[2016.09.09-19.13.54:936][509]r.ViewDistanceScale = “1”
[2016.09.09-19.13.54:936][509]r.ScreenPercentage = “100”
[2016.09.09-19.13.54:936][509]LogLoad: Took 70.933519 seconds to LoadMap(/Game/Levels/MainMenu)

Ok So I reduced the amount of foliage my map contained from 500k to 200k and the time to unload the level went from 1min 10 seconds to literally 10 seconds, So it was probably just too much foliage. I’ts a bit odd that in all the cases the LOADING of the map took only 5 seconds…?