I also noticed that most of the buttons on the bottom bar are missing, but maybe this is normal.

Here is a video clip of it happening: https://youtu.be/tX9FOi6GyzY

https://gist.github.com/HugsLibRecordKeeper/3b2384c711da7566ddd9884ff6e69389

Root level exception in Update(): System.NullReferenceException: Object reference not set to an instance of an object
[Ref D0EA3E6B]
at RealTiltMod.Patch_CurCelestialSunPosition.ReplaceSunPos (UnityEngine.Vector3& __result) [0x00026] in <2c948950cb3b4197b3316c77e2fdb876>:0
at RimWorld.GenCelestial.CurSunPositionInWorldSpace () [0x00046] in <ed371ab4349b419183d9be3af652e6dc>:0
- POSTFIX realtiltmod: Void RealTiltMod.Patch_CurCelestialSunPosition:ReplaceSunPos(Vector3& __result)
at RimWorld.Planet.WorldRendererUtility.UpdateGlobalShadersParams () [0x00000] in <ed371ab4349b419183d9be3af652e6dc>:0
at RimWorld.Planet.WorldRenderer.DrawWorldLayers () [0x00021] in <ed371ab4349b419183d9be3af652e6dc>:0
at RimWorld.Planet.World.WorldUpdate () [0x00023] in <ed371ab4349b419183d9be3af652e6dc>:0
at Verse.Game.UpdatePlay () [0x0004e] in <ed371ab4349b419183d9be3af652e6dc>:0
- POSTFIX net.pardeike.rimworld.mods.achtung: Void AchtungMod.Game_UpdatePlay_Patch:Postfix()
at Verse.Root_Play.Update () [0x00032] in <ed371ab4349b419183d9be3af652e6dc>:0
UnityEngine.StackTraceUtility:ExtractStackTrace ()
(wrapper dynamic-method) MonoMod.Utils.DynamicMethodDefinition:Verse.Log.Error_Patch6 (string)
Verse.Root_Play:Update ()


Root level exception in Update(): System.NullReferenceException: Object reference not set to an instance of an object
[Ref D0EA3E6B] Duplicate stacktrace, see ref for original
UnityEngine.StackTraceUtility:ExtractStackTrace ()
(wrapper dynamic-method) MonoMod.Utils.DynamicMethodDefinition:Verse.Log.Error_Patch6 (string)
Verse.Root_Play:Update ()