diff --git a/‎src/Type/TypeTraverser.php‎
Lines changed: 3 additions & 1 deletion b/‎src/Type/TypeTraverser.php‎
Lines changed: 3 additions & 1 deletion
@@ -69,7 +69,9 @@ public static function mapMemoized(Type $type, TypeTraverserCallable|callable $c
 		$self = new self($cb);
 		$self->memo = [];
 
-		return $self->mapInternal($type);
+		$traverser = $self->mapInternal($type);
+		$self->memo = null;
+		return $traverser;
 	}
 
 	/** @param TypeTraverserCallable|callable(Type $type, callable(Type): Type $traverse): Type $cb */
Original file line number	Diff line number	Diff line change
`@@ -69,7 +69,9 @@ public static function mapMemoized(Type $type, TypeTraverserCallable\|callable $c`
`69`	`69`	`$self = new self($cb);`
`70`	`70`	`$self->memo = [];`
`71`	`71`
`72`		`- return $self->mapInternal($type);`
	`72`	`+ $traverser = $self->mapInternal($type);`
	`73`	`+ $self->memo = null;`
	`74`	`+ return $traverser;`
`73`	`75`	`}`
`74`	`76`
`75`	`77`	`/** @param TypeTraverserCallable\|callable(Type $type, callable(Type): Type $traverse): Type $cb */`