diff --git a/src/Utils/StringUtils.php b/src/Utils/StringUtils.php
index 13079b8d81..725817c5c1 100644
--- a/src/Utils/StringUtils.php
+++ b/src/Utils/StringUtils.php
@@ -22,7 +22,8 @@ public static function csvToArray($args): array
         // Step 4: array_map(...) trims extra whitespace from each item
         // (handles csv strings with extra whitespace, e.g. 'a, b, c')
         //
-        return array_map('trim', array_filter(explode(',', is_array($args) ? implode(',', $args) : $args)));
+        $args = is_array($args) ? implode(',', array_map('strval', $args)) : (string) $args;
+        return array_map('trim', array_filter(explode(',', $args)));
     }
 
     /**