diff --git a/companion/src/firmwares/edgetx/yaml_modeldata.cpp b/companion/src/firmwares/edgetx/yaml_modeldata.cpp
index 3a8d70f4b..e177b7631 100644
--- a/companion/src/firmwares/edgetx/yaml_modeldata.cpp
+++ b/companion/src/firmwares/edgetx/yaml_modeldata.cpp
@@ -312,7 +312,7 @@ bool convert<TimerData>::decode(const Node& node, TimerData& rhs)
   node["showElapsed"] >> rhs.showElapsed;
   node["extraHaptic"] >> rhs.extraHaptic;
 
-  if (rhs.extraHaptic) 
+  if (rhs.extraHaptic)
     rhs.countdownBeep += TimerData::COUNTDOWNBEEP_VOICE + 1;
 
   return true;
@@ -577,7 +577,7 @@ struct RFAlarms {
   int critical = 0;
 
   RFAlarms() {}
-  
+
   RFAlarms(const RSSIAlarmData& rhs)
     : warning(rhs.warning), critical(rhs.critical)
   {}
@@ -1206,6 +1206,10 @@ bool convert<ModelData>::decode(const Node& node, ModelData& rhs)
     }
   }
 
+  // perform integrity checks and fix-ups
+
+  rhs.sortMixes();  // critical for Companion and radio that mix lines are in sequence
+
   return true;
 }
 
diff --git a/companion/src/firmwares/modeldata.h b/companion/src/firmwares/modeldata.h
index d13090677..7e8971809 100644
--- a/companion/src/firmwares/modeldata.h
+++ b/companion/src/firmwares/modeldata.h
@@ -230,6 +230,7 @@ class ModelData {
     int linkedFlightModeValueToIndex(const int phaseIdx, const int val, const int maxOwnValue);
 
     void clearMixes();
+    void sortMixes();
     void clearInputs();
 
     int getChannelsMax(bool forceExtendedLimits=false) const;
@@ -363,6 +364,5 @@ class ModelData {
       if (value != swtch.toValue())
         value = swtch.toValue();
     }
-    void sortMixes();
     void updateResetParam(CustomFunctionData * cfd);
 };
diff --git a/radio/src/storage/storage_common.cpp b/radio/src/storage/storage_common.cpp
index 9523cb80e..b67d776bb 100644
--- a/radio/src/storage/storage_common.cpp
+++ b/radio/src/storage/storage_common.cpp
@@ -95,6 +95,37 @@ void postRadioSettingsLoad()
 #endif
 }
 
+static void sortMixerLines()
+{
+  // simple bubble sort
+  unsigned passes = 0;
+  unsigned swaps;
+  MixData tmp;
+  
+  do {
+    swaps = 0;
+    for (int i = 0; i < MAX_MIXERS - 1; i++) {
+      auto a = mixAddress(i);
+      auto b = mixAddress(i + 1);
+
+      if (b->destCh < a->destCh) {
+        if (is_memclear(b, sizeof(MixData)))
+          break;
+
+        memcpy(&tmp, a, sizeof(MixData));
+        memcpy(a, b, sizeof(MixData));
+        memcpy(b, &tmp, sizeof(MixData));
+        ++swaps;
+      }
+    }
+    ++passes;
+  } while(swaps > 0);
+
+  if (passes > 1) {
+    storageDirty(EE_MODEL);
+  }
+}
+
 void postModelLoad(bool alarms)
 {
 #if defined(PXX2)
@@ -126,6 +157,7 @@ void postModelLoad(bool alarms)
   }
 
   loadCurves();
+  sortMixerLines();
 
 #if defined(GUI)
   if (alarms) {