maybe?

LightlessSync/PlayerData/Handlers/GameObjectHandler.cs

@@ -173,6 +173,8 @@ public sealed class GameObjectHandler : DisposableMediatorSubscriberBase, IHighP
     private void CheckAndUpdateObject() => CheckAndUpdateObject(allowPublish: true);
 
     private unsafe void CheckAndUpdateObject(bool allowPublish)
+    {
+        try
         {
             var prevAddr = Address;
             var prevDrawObj = DrawObjectAddress;
@@ -229,10 +231,28 @@ public sealed class GameObjectHandler : DisposableMediatorSubscriberBase, IHighP
             bool drawObjDiff = DrawObjectAddress != prevDrawObj;
             bool addrDiff = Address != prevAddr;
 
-        if (Address != IntPtr.Zero && DrawObjectAddress != IntPtr.Zero
-            && PtrGuard.IsReadable(Address, (nuint)sizeof(Character))
-            && PtrGuard.IsReadable(DrawObjectAddress, (nuint)sizeof(DrawObject)))
+            if (Address == IntPtr.Zero || DrawObjectAddress == IntPtr.Zero)
             {
+                if (addrDiff || drawObjDiff)
+                {
+                    CurrentDrawCondition = DrawCondition.DrawObjectZero;
+                    Logger.LogTrace("[{this}] Changed", this);
+                    if (_isOwnedObject && ObjectKind != ObjectKind.Player)
+                        Mediator.Publish(new ClearCacheForObjectMessage(this));
+                }
+                return;
+            }
+
+            if (!PtrGuard.IsReadable(Address, (nuint)sizeof(Character)) ||
+                !PtrGuard.IsReadable(DrawObjectAddress, (nuint)sizeof(DrawObject)))
+            {
+                Logger.LogTrace("[{this}] Pointers became invalid during update", this);
+                Address = IntPtr.Zero;
+                DrawObjectAddress = IntPtr.Zero;
+                CurrentDrawCondition = DrawCondition.DrawObjectZero;
+                return;
+            }
+
             var chara = (Character*)Address;
             var drawObj = (DrawObject*)DrawObjectAddress;
 
@@ -315,12 +335,11 @@ public sealed class GameObjectHandler : DisposableMediatorSubscriberBase, IHighP
                 Mediator.Publish(new CreateCacheForObjectMessage(this));
             }
         }
-        else if (addrDiff || drawObjDiff)
+        catch (Exception ex)
         {
+            Address = IntPtr.Zero;
+            DrawObjectAddress = IntPtr.Zero;
             CurrentDrawCondition = DrawCondition.DrawObjectZero;
-            Logger.LogTrace("[{this}] Changed", this);
-            if (_isOwnedObject && ObjectKind != ObjectKind.Player)
-                Mediator.Publish(new ClearCacheForObjectMessage(this));
         }
     }
 
@@ -443,11 +462,18 @@ public sealed class GameObjectHandler : DisposableMediatorSubscriberBase, IHighP
     {
         if (Address == IntPtr.Zero) return DrawCondition.ObjectZero;
         if (DrawObjectAddress == IntPtr.Zero) return DrawCondition.DrawObjectZero;
+        
+        if (!PtrGuard.IsReadable(Address, (nuint)sizeof(FFXIVClientStructs.FFXIV.Client.Game.Object.GameObject)))
+            return DrawCondition.ObjectZero;
+        
         var visibilityFlags = ((FFXIVClientStructs.FFXIV.Client.Game.Object.GameObject*)Address)->RenderFlags;
         if (visibilityFlags != VisibilityFlags.None) return DrawCondition.RenderFlags;
 
         if (ObjectKind == ObjectKind.Player)
         {
+            if (!PtrGuard.IsReadable(DrawObjectAddress, (nuint)sizeof(CharacterBase)))
+                return DrawCondition.DrawObjectZero;
+            
             var modelInSlotLoaded = (((CharacterBase*)DrawObjectAddress)->HasModelInSlotLoaded != 0);
             if (modelInSlotLoaded) return DrawCondition.ModelInSlotLoaded;
             var modelFilesInSlotLoaded = (((CharacterBase*)DrawObjectAddress)->HasModelFilesInSlotLoaded != 0);