diff --git a/Marlin/Configuration.h b/Marlin/Configuration.h
index ae67ac5836..8c12135b60 100644
--- a/Marlin/Configuration.h
+++ b/Marlin/Configuration.h
@@ -1197,8 +1197,8 @@
  * Endstop "Hit" State
  * Set to the state (HIGH or LOW) that applies to each endstop.
  */
-#define X_MIN_ENDSTOP_HIT_STATE HIGH
-#define X_MAX_ENDSTOP_HIT_STATE HIGH
+#define X_MIN_ENDSTOP_HIT_STATE LOW
+#define X_MAX_ENDSTOP_HIT_STATE LOW
 #if ENABLED(OpticalY)
   #define Y_MIN_ENDSTOP_HIT_STATE LOW
 #else
@@ -1210,7 +1210,7 @@
 #else
   #define Z_MIN_ENDSTOP_HIT_STATE LOW
 #endif
-#define Z_MAX_ENDSTOP_HIT_STATE HIGH
+#define Z_MAX_ENDSTOP_HIT_STATE LOW
 #define I_MIN_ENDSTOP_HIT_STATE HIGH
 #define I_MAX_ENDSTOP_HIT_STATE HIGH
 #define J_MIN_ENDSTOP_HIT_STATE HIGH
diff --git a/Marlin/Configuration_adv.h b/Marlin/Configuration_adv.h
index ed01895126..0901293b36 100644
--- a/Marlin/Configuration_adv.h
+++ b/Marlin/Configuration_adv.h
@@ -696,8 +696,8 @@
   #define E0_AUTO_FAN_PIN PA8
   #define E1_AUTO_FAN_PIN PE5
 #else
-  #define E0_AUTO_FAN_PIN FAN2_PIN
-  #define E1_AUTO_FAN_PIN FAN2_PIN
+  #define E0_AUTO_FAN_PIN FAN1_PIN
+  #define E1_AUTO_FAN_PIN FAN1_PIN
 #endif
 #define E2_AUTO_FAN_PIN -1
 #define E3_AUTO_FAN_PIN -1
@@ -2031,8 +2031,8 @@
 //
 // Additional options for DGUS / DWIN displays
 //
-  #define DGUS_RX_BUFFER_SIZE 128
-  #define DGUS_TX_BUFFER_SIZE 48
+  #define DGUS_RX_BUFFER_SIZE 256
+  #define DGUS_TX_BUFFER_SIZE 32
 #if HAS_DGUS_LCD
   #define LCD_SERIAL_PORT 3
   #define LCD_BAUDRATE 115200
diff --git a/Marlin/src/lcd/extui/ia_dwin/Creality_DWIN.cpp b/Marlin/src/lcd/extui/ia_dwin/Creality_DWIN.cpp
index d9d8a74081..2b14f8bbaa 100644
--- a/Marlin/src/lcd/extui/ia_dwin/Creality_DWIN.cpp
+++ b/Marlin/src/lcd/extui/ia_dwin/Creality_DWIN.cpp
@@ -47,6 +47,8 @@ namespace ExtUI
   const float manual_feedrate_mm_m[] = MANUAL_FEEDRATE;
   uint8_t startprogress = 0;
 
+  uint16_t rcvdData;
+
   uint8_t babystepIncrementIndex = 0;
 
   char waitway = 0;
@@ -160,7 +162,7 @@ void onIdle()
 {
 
   int dataRec;
-   do { dataRec = rtscheck.RTS_RecData(); } while (dataRec > 0);
+   do { dataRec = rtscheck.RTS_RecData(); rcvdData++;} while (dataRec > 0);
 
   if (reEntryPrevent && reEntryCount < 120) {
     reEntryCount++;
@@ -567,14 +569,21 @@ if(idleThrottling == 1900) {
 
   void yield();
 
-
-if(idleThrottling == 2000) {
-  idleThrottling = 0;
-}
   #if ENABLED(DWINOS_4)
     int dataRec2;
-    do { dataRec2 = rtscheck.RTS_RecData(); } while (dataRec2 > 0); // Since OS4 returns an ack on an 82 command, receive and purge it now
+    do { dataRec2 = rtscheck.RTS_RecData(); rcvdData++;} while (dataRec2 > 0); // Since OS4 returns an ack on an 82 command, receive and purge it now
   #endif
+
+if(idleThrottling == 2000) {
+  if(rcvdData < 4010)
+  {
+    SERIAL_ECHOLNPGM("RX Halt Detected...");
+    RTSSHOW::rx_datagram_state = DGUS_IDLE;
+    DWIN_SERIAL.flush();
+  }
+  idleThrottling = 0;
+}
+
   reEntryPrevent = false;
 }
 
@@ -2904,7 +2913,7 @@ void onSetPowerLoss(const bool onoff)
 }
 void onPowerLoss()
 {
-  
+
 }
 
 
diff --git a/buildroot/share/PlatformIO/scripts/common-cxxflags.py b/buildroot/share/PlatformIO/scripts/common-cxxflags.py
index 0aca5c0d80..bd6199117f 100644
--- a/buildroot/share/PlatformIO/scripts/common-cxxflags.py
+++ b/buildroot/share/PlatformIO/scripts/common-cxxflags.py
@@ -7,7 +7,7 @@ import pioutil
 if pioutil.is_pio_build():
     Import("env")
 
-    env.Replace(PROGNAME="%s_DW9" % (str(env["PIOENV"])))
+    env.Replace(PROGNAME="%s_DW7.4.9" % (str(env["PIOENV"])))
 
     cxxflags = [
         # "-Wno-incompatible-pointer-types",