diff --git a/system/src/Grav/Framework/Flex/Traits/FlexMediaTrait.php b/system/src/Grav/Framework/Flex/Traits/FlexMediaTrait.php
index a86c5886c..970d48f2d 100644
--- a/system/src/Grav/Framework/Flex/Traits/FlexMediaTrait.php
+++ b/system/src/Grav/Framework/Flex/Traits/FlexMediaTrait.php
@@ -256,7 +256,7 @@ trait FlexMediaTrait
     {
         $list = [];
         foreach ($files as $field => $group) {
-            if (\strpos($field, '/', true)) {
+            if ($field === '' || \strpos($field, '/', true)) {
                 continue;
             }
             foreach ($group as $filename => $file) {