Fixed: #2405 Incorrect saving tags after Cloning / Copy-pasting

CHANGELOG.md

@@ -60,6 +60,7 @@ All notable changes to this project will be documented in this file.
 - AS3 difference between namespace keyword and const of type Namespace
 - [#2462] AS3 debugger - incorrect line info injected
 - [#2464] SVG export - minimum stroke width of 1 px
+- [#2405] Incorrect saving tags after Cloning / Copy-pasting
 
 ## [23.0.1] - 2025-05-16
 ### Fixed
@@ -3854,6 +3855,7 @@ Major version of SWF to XML export changed to 2.
 [#2461]: https://www.free-decompiler.com/flash/issues/2461
 [#2462]: https://www.free-decompiler.com/flash/issues/2462
 [#2464]: https://www.free-decompiler.com/flash/issues/2464
+[#2405]: https://www.free-decompiler.com/flash/issues/2405
 [#2427]: https://www.free-decompiler.com/flash/issues/2427
 [#1826]: https://www.free-decompiler.com/flash/issues/1826
 [#2448]: https://www.free-decompiler.com/flash/issues/2448

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/Tag.java

@@ -581,9 +581,15 @@ public abstract class Tag implements NeedsCharacters, Exportable, Serializable {
      * @throws IOException On I/O error
      */
     public Tag cloneTag() throws InterruptedException, IOException {
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
         byte[] data = getData();
+        byte[] headerData = getHeader(data.length);
+        baos.write(headerData);
+        baos.write(data);
+        
+        byte[] dataWithHeader = baos.toByteArray();
         SWFInputStream tagDataStream = new SWFInputStream(swf, data, 0, data.length);
-        TagStub copy = new TagStub(swf, getId(), "Unresolved", new ByteArrayRange(data), tagDataStream);
+        TagStub copy = new TagStub(swf, getId(), "Unresolved", new ByteArrayRange(dataWithHeader), tagDataStream);
         copy.forceWriteAsLong = forceWriteAsLong;
         return SWFInputStream.resolveTag(copy, 0, false, true, false, false);
     }