diff --git a/Versions/build.txt b/Versions/build.txt
index 45c4a6b22..bf88273b1 100644
--- a/Versions/build.txt
+++ b/Versions/build.txt
@@ -1 +1 @@
-2599
+2600
diff --git a/res/Notepad3.exe.manifest.conf b/res/Notepad3.exe.manifest.conf
index dbb9431b9..deb4791b1 100644
--- a/res/Notepad3.exe.manifest.conf
+++ b/res/Notepad3.exe.manifest.conf
@@ -3,7 +3,7 @@
   <assemblyIdentity
     name="Notepad3"
     processorArchitecture="*"
-    version="5.19.827.2599"
+    version="5.19.827.2600"
     type="win32"
   />
   <description>Notepad3 BETA</description>
diff --git a/src/Config/Config.cpp b/src/Config/Config.cpp
index 8c06018c3..2fb0292d5 100644
--- a/src/Config/Config.cpp
+++ b/src/Config/Config.cpp
@@ -631,10 +631,8 @@ void LoadSettings()
     FileWatching.AutoReloadTimeout = Settings2.AutoReloadTimeout;
 
     Defaults2.UndoRedoSplitTimeout = 0UL;
-    Settings2.UndoRedoSplitTimeout = IniSectionGetInt(Settings2_Section, L"UndoRedoSplitTimeout", Defaults2.UndoRedoSplitTimeout);
-    if (Settings2.UndoRedoSplitTimeout != 0) {
-      Settings2.UndoRedoSplitTimeout = clampul(Settings2.UndoRedoSplitTimeout, 100UL, 86400000UL); // max: 24h
-    }
+    Settings2.UndoRedoSplitTimeout = clampul(IniSectionGetInt(Settings2_Section, L"UndoRedoSplitTimeout", 
+      Defaults2.UndoRedoSplitTimeout), 0UL, 86400000UL);
 
     // deprecated
     Defaults.RenderingTechnology = IniSectionGetInt(Settings2_Section, L"SciDirectWriteTech", -111);
diff --git a/src/Notepad3.c b/src/Notepad3.c
index e049ac8b9..aecd38837 100644
--- a/src/Notepad3.c
+++ b/src/Notepad3.c
@@ -459,6 +459,7 @@ static int msgcmp(void* mqc1, void* mqc2)
 }
 // ----------------------------------------------------------------------------
 
+#define _MQ_IMMEDIATE (2 * USER_TIMER_MINIMUM - 1)
 #define _MQ_ms(T) ((T) / USER_TIMER_MINIMUM)
 
 static void  _MQ_AppendCmd(CmdMessageQueue_t* const pMsgQCmd, int cycles)
@@ -6976,7 +6977,7 @@ inline static LRESULT _MsgNotifyLean(const LPNMHDR pnmh, const SCNotification* c
             _SaveRedoSelection(_SaveUndoSelection());
           }
         }
-        if (Settings2.UndoRedoSplitTimeout != 0) {
+        if (Settings2.UndoRedoSplitTimeout > _MQ_IMMEDIATE) {
           _DelayUndoRedoTypingSequenceSplit(Settings2.UndoRedoSplitTimeout);
         }
         bModified = false; // not yet
@@ -6991,7 +6992,12 @@ inline static LRESULT _MsgNotifyLean(const LPNMHDR pnmh, const SCNotification* c
           RestoreAction(scn->token, REDO);
         }
       }
-      if (bModified) { _SetSaveNeededFlag(true); }
+      if (bModified) { 
+        if ((Settings2.UndoRedoSplitTimeout > 0UL) && (Settings2.UndoRedoSplitTimeout <= _MQ_IMMEDIATE)) {
+          SciCall_BeginUndoAction(); SciCall_EndUndoAction();
+        }
+        _SetSaveNeededFlag(true);
+      }
     }
     else if (pnmh->code == SCN_SAVEPOINTREACHED) {
       _SetSaveNeededFlag(false);
@@ -7063,7 +7069,7 @@ static LRESULT _MsgNotifyFromEdit(HWND hwnd, const LPNMHDR pnmh, const SCNotific
             _SaveRedoSelection(_SaveUndoSelection());
           }
         }
-        if (Settings2.UndoRedoSplitTimeout != 0) {
+        if (Settings2.UndoRedoSplitTimeout > _MQ_IMMEDIATE) {
           _DelayUndoRedoTypingSequenceSplit(Settings2.UndoRedoSplitTimeout);
         }
         bModified = false; // not yet
@@ -7085,6 +7091,9 @@ static LRESULT _MsgNotifyFromEdit(HWND hwnd, const LPNMHDR pnmh, const SCNotific
         if (scn->linesAdded != 0) {
           UpdateMarginWidth();
         }
+        if ((Settings2.UndoRedoSplitTimeout > 0UL) && (Settings2.UndoRedoSplitTimeout <= _MQ_IMMEDIATE)) {
+          SciCall_BeginUndoAction(); SciCall_EndUndoAction();
+        }
         _SetSaveNeededFlag(true);
       }
 
diff --git a/src/VersionEx.h b/src/VersionEx.h
index ce0de48aa..b27991c24 100644
--- a/src/VersionEx.h
+++ b/src/VersionEx.h
@@ -8,7 +8,7 @@
 #define VERSION_MAJOR 5
 #define VERSION_MINOR 19
 #define VERSION_REV 827
-#define VERSION_BUILD 2599
+#define VERSION_BUILD 2600
 #define SCINTILLA_VER 420
 #define ONIGURUMA_REGEX_VER 6.9.3
 #define UCHARDET_VER 2018.09.27