diff --git a/src/Tracy/Dumper/Exposer.php b/src/Tracy/Dumper/Exposer.php
index 04a5d4f60..5a7d5c0e5 100644
--- a/src/Tracy/Dumper/Exposer.php
+++ b/src/Tracy/Dumper/Exposer.php
@@ -239,7 +239,7 @@ public static function exposeDsCollection(
 		Describer $describer,
 	): void
 	{
-		foreach ($obj as $k => $v) {
+		foreach (clone $obj as $k => $v) {
 			$describer->addPropertyTo($value, (string) $k, $v);
 		}
 	}
diff --git a/tests/Tracy/Dumper.toText().specials.ds.phpt b/tests/Tracy/Dumper.toText().specials.ds.phpt
index b2460650b..b475df4eb 100644
--- a/tests/Tracy/Dumper.toText().specials.ds.phpt
+++ b/tests/Tracy/Dumper.toText().specials.ds.phpt
@@ -34,3 +34,25 @@ Assert::match(
 		XX,
 	Dumper::toText($map),
 );
+
+
+$queue = new Ds\Queue(['value']);
+Assert::match(
+	<<<'XX'
+		Ds\Queue #%d%
+		   0: 'value'
+		XX,
+	Dumper::toText($queue),
+);
+Assert::count(1, $queue);
+
+
+$stack = new Ds\Stack(['value']);
+Assert::match(
+	<<<'XX'
+		Ds\Stack #%d%
+		   0: 'value'
+		XX,
+	Dumper::toText($stack),
+);
+Assert::count(1, $stack);