Hello author,
I recently find a problem that when pawns have the part "reactive shimmerworms" and hit by enemy, they will disappear with all enemy surrounding and out of control. Red error message keep jumping out in the debug log:

Root level exception in Update(): System.InvalidCastException: Specified cast is not valid.
[Ref CFEAE703]
at Verse.HediffComp_Invisibility.get_ForcedVisible () [0x00019] in <f0ac5eb9b52e4cc396c70fc9a4ee15e5>:0
at Verse.HediffComp_Invisibility.get_PsychologicallyVisible () [0x00000] in <f0ac5eb9b52e4cc396c70fc9a4ee15e5>:0
at RimWorld.InvisibilityUtility.IsPsychologicallyInvisible (Verse.Pawn pawn) [0x00025] in <f0ac5eb9b52e4cc396c70fc9a4ee15e5>:0
at Verse.PawnRenderer.PawnNeedsHediffMaterial (Verse.PawnRenderFlags& renderFlags) [0x00003] in <f0ac5eb9b52e4cc396c70fc9a4ee15e5>:0
at Verse.PawnRenderer.get_DefaultRenderFlagsNow () [0x00000] in <f0ac5eb9b52e4cc396c70fc9a4ee15e5>:0
at Verse.PawnRenderer.EnsureGraphicsInitialized () [0x00000] in <f0ac5eb9b52e4cc396c70fc9a4ee15e5>:0
at Verse.PawnRenderer.DynamicDrawPhaseAt (Verse.DrawPhase phase, UnityEngine.Vector3 drawLoc, System.Nullable`1[T] rotOverride, System.Boolean neverAimWeapon) [0x00003] in <f0ac5eb9b52e4cc396c70fc9a4ee15e5>:0
at Verse.Pawn.DynamicDrawPhaseAt (Verse.DrawPhase phase, UnityEngine.Vector3 drawLoc, System.Boolean flip) [0x0000f] in <f0ac5eb9b52e4cc396c70fc9a4ee15e5>:0
at Verse.Thing.DynamicDrawPhase (Verse.DrawPhase phase) [0x00017] in <f0ac5eb9b52e4cc396c70fc9a4ee15e5>:0
at Verse.DynamicDrawManager.DrawDynamicThings () [0x0006f] in <f0ac5eb9b52e4cc396c70fc9a4ee15e5>:0
at Verse.Map.MapUpdate () [0x000c6] in <f0ac5eb9b52e4cc396c70fc9a4ee15e5>:0
at Verse.Game.UpdatePlay () [0x00049] in <f0ac5eb9b52e4cc396c70fc9a4ee15e5>:0
at Verse.Root_Play.Update () [0x00032] in <f0ac5eb9b52e4cc396c70fc9a4ee15e5>:0
UnityEngine.StackTraceUtility:ExtractStackTrace ()
Verse.Log:Error (string)
Verse.Root_Play:Update ()

Root level exception in Update(): System.InvalidCastException: Specified cast is not valid.
[Ref CFEAE703] Duplicate stacktrace, see ref for original
UnityEngine.StackTraceUtility:ExtractStackTrace ()
Verse.Log:Error (string)
Verse.Root_Play:Update ()

It seems there is a problem with the hediffs called "Phychic invisibility". Can you please take some time to check it?