I\'ve started working with firebase storage and firebase functions recently. Right now I\'ve been developing file upload from functions to storage .
I\'ve got it working
In my case I added metadata while uploading and it loading as it showed in image but when I'm refresh page after 3 min I found that it upload correctly , so as Cafn explain if it not matter of metadata you should wait until it loaded
$uploadedObject=$bucket->upload($imageFile, [
'name' => 'Image_Name',
"metadata" => [ "contentType"=> 'image/png'],
]);