diff --git a/src/Capability/Completion/ListCompletionProvider.php b/src/Capability/Completion/ListCompletionProvider.php
index 5e066dec..ce5eff8f 100644
--- a/src/Capability/Completion/ListCompletionProvider.php
+++ b/src/Capability/Completion/ListCompletionProvider.php
@@ -35,9 +35,13 @@ public function getCompletions(string $currentValue): array
             return $this->values;
         }
 
-        return array_values(array_filter(
-            $this->values,
-            static fn (string $value) => str_starts_with($value, $currentValue)
-        ));
+        $completions = [];
+        foreach ($this->values as $value) {
+            if (str_starts_with($value, $currentValue)) {
+                $completions[] = $value;
+            }
+        }
+
+        return $completions;
     }
 }
diff --git a/tests/Unit/Capability/Completion/ListCompletionProviderTest.php b/tests/Unit/Capability/Completion/ListCompletionProviderTest.php
index 4870d737..729dd2bc 100644
--- a/tests/Unit/Capability/Completion/ListCompletionProviderTest.php
+++ b/tests/Unit/Capability/Completion/ListCompletionProviderTest.php
@@ -55,4 +55,12 @@ public function testKeysAreDiscarded(): void
 
         $this->assertSame(['a', 'b'], $provider->getCompletions(''));
     }
+
+    public function testPrefixMatchesPreserveOrderAndDuplicates(): void
+    {
+        $provider = new ListCompletionProvider(['beta', 'alpine', 'alpha', 'alpine']);
+
+        $this->assertSame(['alpine', 'alpha', 'alpine'], $provider->getCompletions('al'));
+        $this->assertSame([], $provider->getCompletions('missing'));
+    }
 }