diff --git a/src/Plugin/Autocomplete/Handler.php b/src/Plugin/Autocomplete/Handler.php
index 07dd2d70..319ff627 100644
--- a/src/Plugin/Autocomplete/Handler.php
+++ b/src/Plugin/Autocomplete/Handler.php
@@ -116,6 +116,12 @@ public function getSuggestions(array $phrases, int $maxCount = 10): array {
 		// so in the end, we wind up with multiple suggestions for the same phrase
 		/** @var array<string> $suggestions */
 		$suggestions = array_unique(Arrays::blend(...$combinationSets));
+		foreach ($suggestions as &$suggestion) {
+			if (!is_numeric($suggestion)) {
+				continue;
+			}
+			$suggestion = (string)$suggestion;
+		}
 		return $suggestions;
 	}