diff --git a/source/EngineGpuKernels/CellFunctionProcessor.cuh b/source/EngineGpuKernels/CellFunctionProcessor.cuh
index e39d43fc4..34f807351 100644
--- a/source/EngineGpuKernels/CellFunctionProcessor.cuh
+++ b/source/EngineGpuKernels/CellFunctionProcessor.cuh
@@ -87,9 +87,10 @@ __inline__ __device__ void CellFunctionProcessor::resetFetchedActivities(Simulat
                 auto otherExecutionOrderNumber = cell->connections[i].cell->executionOrderNumber;
                 auto otherInputExecutionOrderNumber = cell->connections[i].cell->inputExecutionOrderNumber;
                 auto otherOutputBlocked = cell->connections[i].cell->outputBlocked;
-                bool flowToCell =
-                    cell->inputExecutionOrderNumber == otherExecutionOrderNumber && !otherOutputBlocked
-                      && cell->executionOrderNumber > otherInputExecutionOrderNumber;
+                bool flowToCell = !(cudaSimulationParameters.features.legacyModes && cudaSimulationParameters.legacyCellDirectionalConnection)
+                    ? cell->inputExecutionOrderNumber == otherExecutionOrderNumber && !otherOutputBlocked
+                        && cell->executionOrderNumber > otherInputExecutionOrderNumber
+                    : false;
                 if (otherInputExecutionOrderNumber == cell->executionOrderNumber && !flowToCell) {
                     if (maxOtherExecutionOrderNumber == -1) {
                         maxOtherExecutionOrderNumber = otherExecutionOrderNumber;
@@ -134,8 +135,8 @@ __inline__ __device__ Activity CellFunctionProcessor::calcInputActivity(Cell* ce
         if (connectedCell->outputBlocked || connectedCell->livingState != LivingState_Ready ) {
             continue;
         }
-        if (connectedCell->inputExecutionOrderNumber == cell->executionOrderNumber && connectedCell->executionOrderNumber > cell->executionOrderNumber
-            && !cell->outputBlocked) {
+        if (!(cudaSimulationParameters.features.legacyModes && cudaSimulationParameters.legacyCellDirectionalConnection) && connectedCell->inputExecutionOrderNumber == cell->executionOrderNumber
+            && connectedCell->executionOrderNumber > cell->executionOrderNumber && !cell->outputBlocked) {
             continue;
         }
         if (connectedCell->executionOrderNumber == cell->inputExecutionOrderNumber) {
diff --git a/source/EngineGpuKernels/MuscleProcessor.cuh b/source/EngineGpuKernels/MuscleProcessor.cuh
index d3817dc8b..26169f4ab 100644
--- a/source/EngineGpuKernels/MuscleProcessor.cuh
+++ b/source/EngineGpuKernels/MuscleProcessor.cuh
@@ -118,7 +118,7 @@ __device__ __inline__ void MuscleProcessor::movement(SimulationData& data, Simul
     cell->vel += direction;
     cell->cellFunctionData.muscle.lastMovementX = direction.x;
     cell->cellFunctionData.muscle.lastMovementY = direction.y;
-    if (!cudaSimulationParameters.features.legacyModes || !cudaSimulationParameters.legacyCellFunctionMuscleNoActivityReset) {
+    if (!(cudaSimulationParameters.features.legacyModes && cudaSimulationParameters.legacyCellFunctionMuscleNoActivityReset)) {
         activity.channels[0] = 0;
         activity.origin = ActivityOrigin_Unknown;
     }
diff --git a/source/EngineInterface/LegacyAuxiliaryDataParserService.cpp b/source/EngineInterface/LegacyAuxiliaryDataParserService.cpp
index cdc9e9937..c94dcb80e 100644
--- a/source/EngineInterface/LegacyAuxiliaryDataParserService.cpp
+++ b/source/EngineInterface/LegacyAuxiliaryDataParserService.cpp
@@ -173,6 +173,7 @@ void LegacyAuxiliaryDataParserService::activateParametersAndFeaturesForLegacyFil
     if (programVersion.empty()) {
         parameters.features.legacyModes = true;
         parameters.legacyCellFunctionMuscleNoActivityReset = true;
+        parameters.legacyCellDirectionalConnection = true;
     }
 
     //*******************
diff --git a/source/EngineInterface/SimulationParameters.cpp b/source/EngineInterface/SimulationParameters.cpp
index 398048a74..11a22430a 100644
--- a/source/EngineInterface/SimulationParameters.cpp
+++ b/source/EngineInterface/SimulationParameters.cpp
@@ -204,5 +204,6 @@ bool SimulationParameters::operator==(SimulationParameters const& other) const
         && legacyCellFunctionMuscleMovementAngleFromSensor == other.legacyCellFunctionMuscleMovementAngleFromSensor
         && muscleMovementVisualization == other.muscleMovementVisualization
         && legacyCellFunctionMuscleNoActivityReset == other.legacyCellFunctionMuscleNoActivityReset
+        && legacyCellDirectionalConnection == other.legacyCellDirectionalConnection
         ;
 }
\ No newline at end of file
diff --git a/source/EngineInterface/SimulationParameters.h b/source/EngineInterface/SimulationParameters.h
index 37548fe63..6760f71a0 100644
--- a/source/EngineInterface/SimulationParameters.h
+++ b/source/EngineInterface/SimulationParameters.h
@@ -204,6 +204,7 @@ struct SimulationParameters
 
     bool legacyCellFunctionMuscleMovementAngleFromSensor = false;
     bool legacyCellFunctionMuscleNoActivityReset = false;
+    bool legacyCellDirectionalConnection = false;
 
     bool operator==(SimulationParameters const& other) const;
     bool operator!=(SimulationParameters const& other) const { return !operator==(other); }
diff --git a/source/Gui/SimulationParametersWindow.cpp b/source/Gui/SimulationParametersWindow.cpp
index 1e42f4200..74f73fc62 100644
--- a/source/Gui/SimulationParametersWindow.cpp
+++ b/source/Gui/SimulationParametersWindow.cpp
@@ -1592,6 +1592,13 @@ void _SimulationParametersWindow::processBase()
                             .tooltip("If activated, the activity in channel #0 is not set to 0 in muscle cells which are in movement mode. Thus the output of this type "
                                      "of muscles can be reused for other muscle cells."),
                         parameters.legacyCellFunctionMuscleNoActivityReset);
+                    AlienImGui::Checkbox(
+                        AlienImGui::CheckboxParameters()
+                            .name("Allow bidirectional connections")
+                            .textWidth(RightColumnWidth)
+                            .defaultValue(origParameters.legacyCellDirectionalConnection)
+                            .tooltip("If activated, two connected cells can receive each other's input if the 'input execution number' matches."),
+                        parameters.legacyCellDirectionalConnection);
                     AlienImGui::EndTreeNode();
                 }
             }