Fix Relation::from_bits

src/ecs/relation.rs

@@ -78,9 +78,13 @@ impl Relation {
     #[inline]
     #[must_use]
     pub fn from_bits(bits: u64) -> Option<Self> {
-        let kind = (bits >> 32) as u32;
         let target = bits as u32;
+        let high = (bits >> 32) as u32;
+        if let (kind, Flags::RELATION) = Flags::unpack(high)? {
         Self::new_checked(kind, target)
+        } else {
+            None
+        }
     }
 
     #[inline]