AWS S3 image is not showing on edit

[fvukojevic]

I have an entity that stores images in s3. This is how I modified my field:

            ImageField::new('mainImage', 'Slika Poduzeća')
                ->setBasePath($this->getBaseUrlForS3())
                ->setUploadDir('') // Dummy - unused we use s3
                ->setRequired(false)
                ->setHelp('Glavna slika poduzeća/logo (opcionalno)')
                ->setUploadedFileNamePattern('[randomhash].[extension]')  // Customize the pattern
                ->setFormTypeOption('upload_new', function (UploadedFile $file, string $uploadDir, string $fileName) {
                    $filePath = 'pages/' . $fileName;
                    $this->s3Service->uploadFile($file, $filePath);
                    return $filePath;
                })
                ->setFormTypeOption('upload_delete', function (string $filePath) {
                    // Delete the file from S3 via S3Service
                    $this->s3Service->deleteFile($filePath);
                })
                ->setFormTypeOption('mapped', true)
                ->setFormTypeOption('data_class', null) // Ensure that the field gets populated with the existing value

Saving works nicely, image is shown on both detail and list page, but when I click on edit, the image is not shown in the image field + if I just save then, it gets deleted like I removed it. Anyone able to tell me why and how to fix this?