fix: issue #4878

javascript/bigup.js

@@ -1105,7 +1105,15 @@ async function compress(file, maxWidth = 0, maxHeight = 0, quality = 85) {
 	}
 
 	const blob = await new Promise(resolve => data.image.toBlob(
-		blob => resolve(blob),
+		blob => {
+			if (data.imageHead) {
+				loadImage.replaceHead(blob, data.imageHead, function (newBlob) {
+					return resolve(newBlob);
+				})
+			} else {
+				return resolve(blob);
+			}
+		},
 		file.file.type,
 		quality
 	));