diff --git a/CHANGELOG.md b/CHANGELOG.md
index 13d81149f..7a467ece6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,7 @@ All notable changes to this project will be documented in this file.
 ### Fixed
 - [#2319] AS3 Compound assignments problems in some cases
 - [#2319] AS3 direct editation - class gets removed after pressing cancel
+- [#2320] AS3 direct editation - modified flag of scripts vanishes after editing other script with and having error
 
 ## [21.1.0] - 2024-09-23
 ### Added
@@ -3574,6 +3575,7 @@ Major version of SWF to XML export changed to 2.
 [alpha 8]: https://github.com/jindrapetrik/jpexs-decompiler/compare/alpha7...alpha8
 [alpha 7]: https://github.com/jindrapetrik/jpexs-decompiler/releases/tag/alpha7
 [#2319]: https://www.free-decompiler.com/flash/issues/2319
+[#2320]: https://www.free-decompiler.com/flash/issues/2320
 [#943]: https://www.free-decompiler.com/flash/issues/943
 [#1812]: https://www.free-decompiler.com/flash/issues/1812
 [#2287]: https://www.free-decompiler.com/flash/issues/2287
diff --git a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/abc/avm2/parser/script/ActionScript3Parser.java b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/abc/avm2/parser/script/ActionScript3Parser.java
index 2789dc976..b35e5e236 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/abc/avm2/parser/script/ActionScript3Parser.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/abc/avm2/parser/script/ActionScript3Parser.java
@@ -131,8 +131,10 @@ import java.io.OutputStream;
 import java.util.AbstractMap;
 import java.util.ArrayList;
 import java.util.HashMap;
+import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
 import java.util.Stack;
 import java.util.logging.Level;
 import java.util.logging.Logger;
@@ -3013,6 +3015,12 @@ public class ActionScript3Parser {
         ActionScript3Parser parser = new ActionScript3Parser(abcIndex);
         boolean success = false;
         ABC originalAbc = ((ABCContainerTag) ((Tag) abc.parentTag).cloneTag()).getABC();
+        Set<Integer> modifiedScripts = new HashSet<>();        
+        for (int i = 0; i < abc.script_info.size(); i++) {
+            if (abc.script_info.get(i).isModified()) {
+                modifiedScripts.add(i);
+            }
+        }
         try {
             parser.addScript(src, fileName, classPos, scriptIndex, documentClass, abc);
             success = true;
@@ -3027,6 +3035,12 @@ public class ActionScript3Parser {
                 abc.script_info = originalAbc.script_info;
                 abc.bodies = originalAbc.bodies;
                 abc.resetMethodIndexing();
+                
+                for (int i = 0; i < abc.script_info.size(); i++) {
+                    if (modifiedScripts.contains(i)) {
+                        abc.script_info.get(i).setModified(true);
+                    }
+                }
             }
         }
     }