Dedicated Server freeze maybe Steamworks issue

This issue appeared twice during last week.

This is the last log entries of the server:

2018-08-27 16:46:35.447 - Thread:   6 ->  GC Memory: 4,518,368,224 B
2018-08-27 16:46:56.755 - Thread:   6 ->  STATISTICS LEGEND,time,ReceivedPerSecond,SentPerSecond,PeakReceivedPerSecond,PeakSentPerSecond,OverallReceived,OverallSent,CPULoadSmooth,ThreadLoadSmooth,GetOnlinePlayerCount,Ping,GCMemory,ProcessMemory,PCUBuilt,PCU,GridsCount,RenderCPULoadSmooth,RenderGPULoadSmooth,HardwareCPULoad,HardwareAvailableMemory
2018-08-27 16:46:56.755 - Thread:   6 ->  STATISTICS,51794.3833335467,0.02544594,0.1741409,0.08034992,7.63218,653.2324,4287.659,86.36617,13.66849,5,0,4340.256,4529.34,337910,462090,89,0,0,16.06478,53023
2018-08-27 16:47:05.453 - Thread:   6 ->  GC Memory: 4,560,415,744 B
2018-08-27 16:47:07.066 - Thread:   6 ->  Clusters reordered
2018-08-27 16:47:35.469 - Thread:   6 ->  GC Memory: 4,457,596,752 B
2018-08-27 16:47:38.483 - Thread:   6 ->  Autosave initiated
2018-08-27 16:47:38.483 - Thread:   6 ->  Character state: True
2018-08-27 16:47:38.483 - Thread:   6 ->  IsServer: True
2018-08-27 16:47:38.483 - Thread:   6 ->  MyAsyncSaving.InProgress: False
2018-08-27 16:47:38.483 - Thread:   6 ->  Autosave
2018-08-27 16:47:38.483 - Thread:   6 ->  Saving world - START
2018-08-27 16:47:38.483 - Thread:   6 ->     Making world state snapshot.
2018-08-27 16:47:38.483 - Thread:   6 ->     Before snapshot.: GC Memory: 4,467,026,920 B
2018-08-27 16:47:38.568 - Thread:   6 ->     After snapshot.: GC Memory: 4,482,944,720 B
2018-08-27 16:47:38.586 - Thread:   6 ->     Directory cleanup: GC Memory: 4,482,532,848 B
2018-08-27 16:47:38.586 - Thread:   6 ->  Saving world - END
2018-08-27 16:47:38.586 - Thread:  18 ->  Session snapshot save - START
2018-08-27 16:47:38.587 - Thread:  18 ->     Checking file access for files in target dir.
2018-08-27 16:47:42.314 - Thread:  18 ->  Session snapshot save - END
2018-08-27 16:47:57.696 - Thread:   6 ->  STATISTICS LEGEND,time,ReceivedPerSecond,SentPerSecond,PeakReceivedPerSecond,PeakSentPerSecond,OverallReceived,OverallSent,CPULoadSmooth,ThreadLoadSmooth,GetOnlinePlayerCount,Ping,GCMemory,ProcessMemory,PCUBuilt,PCU,GridsCount,RenderCPULoadSmooth,RenderGPULoadSmooth,HardwareCPULoad,HardwareAvailableMemory
2018-08-27 16:47:57.696 - Thread:   6 ->  STATISTICS,51854.4,0.02634907,0.152523,0.08034992,7.63218,654.6548,4297.556,91.98034,3.92486,5,0,4341.695,4529.34,337910,462090,89,0,0,18.92152,53015
2018-08-27 16:48:05.484 - Thread:   6 ->  GC Memory: 4,557,101,560 B

And after restarting it, it shows this multiple times, until server were able to get up:

2018-08-27 17:43:10.442 - Thread:   6 ->  MySandboxGame.Constructor() - END
2018-08-27 17:43:10.442 - Thread:   6 ->  Server Name: Jager & Friends
2018-08-27 17:43:10.442 - Thread:   6 ->  World Name: (Workshop) The Solar System
2018-08-27 17:43:10.473 - Thread:  24 ->  Remote API unable to start. Run dedicated server in administrator mode or use AllowRemoteHttp.bat file.
2018-08-27 17:43:10.566 - Thread:   6 ->  Auto Restart Enabled
2018-08-27 17:43:10.568 - Thread:   6 ->  MySandboxGame.Initialize() - START
2018-08-27 17:43:10.616 - Thread:   6 ->     MyGuiGameControlsHelpers()
2018-08-27 17:43:10.643 - Thread:   6 ->     Havok: Physics.Init
2018-08-27 17:43:10.643 - Thread:   6 ->     Havok: Version: Release(0), 1800, [S]
2018-08-27 17:43:10.645 - Thread:   6 ->     HkGameName: SpaceEngineers Release
2018-08-27 17:43:10.653 - Thread:   6 ->     MySandboxGame.LoadData() - START
2018-08-27 17:43:10.657 - Thread:   6 ->        MyDefinitionManager.PreloadDefinitions() - START
2018-08-27 17:43:10.784 - Thread:   6 ->        MyDefinitionManager.PreloadDefinitions() - END
2018-08-27 17:43:10.852 - Thread:   6 ->     MySandboxGame.LoadData() - END
2018-08-27 17:43:10.959 - Thread:  16 ->  MyDefinitionManager.PrepareBaseDefinitions() - START
2018-08-27 17:43:12.276 - Thread:   6 ->     MyGuiScreenGDPR.ctor START
2018-08-27 17:43:12.278 - Thread:   6 ->     MyGuiScreenWelcomeScreen.ctor START
2018-08-27 17:43:12.282 - Thread:   6 ->     Loading last session C:\ProgramData\SpaceEngineersDedicated\se3\Saves\The Solar System
2018-08-27 17:43:12.729 - Thread:   6 ->     Downloading world mods - START
2018-08-27 17:43:12.738 - Thread:   6 ->        Exception while loading world: Steamworks is not initialized.
2018-08-27 17:43:12.740 - Thread:   6 ->           at Steamworks.InteropHelp.TestIfAvailableClient()
   at Steamworks.SteamUGC.ReleaseQueryUGCRequest(UGCQueryHandle_t handle)
   at VRage.Steam.Steamworks.MySteamUgcClient.ReleaseQueryUGCRequest(UGCQueryHandle_t handle)
   at VRage.Steam.MySteamWorkshopQuery.QueryCleanup()
   at VRage.Steam.MySteamWorkshopQuery.RunQuery()
   at Sandbox.Engine.Networking.MyWorkshop.GetModsInfo(List`1 publishedFileIds)
   at Sandbox.Engine.Networking.MyWorkshop.GetModsDependencyHiearchy(HashSet`1 publishedFileIds, Boolean& hasReferenceIssue)
   at Sandbox.Engine.Networking.MyWorkshop.CheckModDependencies(List`1 mods, List`1 publishedFileIds)
   at Sandbox.Engine.Networking.MyWorkshop.DownloadWorldModsBlocking(List`1 mods)
   at Sandbox.MySandboxGame.InitQuickLaunch()
2018-08-27 17:43:12.740 - Thread:   6 ->     MySandboxGame.Initialize() - END
2018-08-27 17:43:12.746 - Thread:   6 ->     Timer Frequency: 3515625
2018-08-27 17:43:12.746 - Thread:   6 ->     Ticks per frame: 58594
2018-08-27 17:43:12.746 - Thread:   6 ->     Exiting..
2018-08-27 17:43:12.750 - Thread:   6 ->     MySandboxGame.UnloadData() - START
2018-08-27 17:43:12.765 - Thread:   6 ->     MySandboxGame.UnloadData() - END
2018-08-27 17:43:13.564 - Thread:  16 ->  MyDefinitionManager.PrepareBaseDefinitions() - END
2018-08-27 17:43:13.810 - Thread:   6 ->     Network readers disposed
2018-08-27 17:43:13.811 - Thread:   6 ->     Logging off Steam...
2018-08-27 17:43:13.812 - Thread:   6 ->     Shutting down server...
2018-08-27 17:43:13.818 - Thread:   6 ->     Done
2018-08-27 17:43:13.864 - Thread:   6 ->     Steam closed
2018-08-27 17:43:13.875 - Thread:   6 ->     Log Closed