Fix #20285: Workaround to disable tweening when updated from UI

src/openrct2/entity/EntityRegistry.cpp

@@ -473,6 +473,13 @@ void EntityBase::MoveTo(const CoordsXYZ& newLocation)
         EntitySetCoordinates(loc, this);
         Invalidate(); // Invalidate new position.
     }
+
+    if (!gInUpdateCode)
+    {
+        // Make sure we don't tween when the position was modified outside of the
+        // update loop.
+        RenderFlags |= EntityRenderFlags::kInvalidateTweening;
+    }
 }
 
 void EntitySetCoordinates(const CoordsXYZ& entityPos, EntityBase* entity)

src/openrct2/entity/EntityTweener.cpp

@@ -19,7 +19,7 @@
 void EntityTweener::AddEntity(EntityBase* entity)
 {
     entity->RenderFlags &= ~EntityRenderFlags::kInvalidateTweening;
-    
+
     Entities.push_back(entity);
     PrePos.emplace_back(entity->GetLocation());
 }