diff --git a/python/PyQt6/core/auto_generated/qgsfeature.sip.in b/python/PyQt6/core/auto_generated/qgsfeature.sip.in
index 27cf92c2803..ac48f6ef974 100644
--- a/python/PyQt6/core/auto_generated/qgsfeature.sip.in
+++ b/python/PyQt6/core/auto_generated/qgsfeature.sip.in
@@ -53,7 +53,8 @@ geometry and a list of field/values attributes.
     else
     {
       const QVariant v = sipCpp->attribute( a0 );
-      if ( QgsVariantUtils::isNull( v, true ) )
+      // QByteArray null handling is "special"! See null_from_qvariant_converter in conversions.sip
+      if ( QgsVariantUtils::isNull( v, true ) && v.userType() != QMetaType::Type::QByteArray )
       {
         Py_INCREF( Py_None );
         sipRes = Py_None;
@@ -115,7 +116,8 @@ geometry and a list of field/values attributes.
     else
     {
       const QVariant v = sipCpp->attribute( fieldIdx );
-      if ( QgsVariantUtils::isNull( v, true ) )
+      // QByteArray null handling is "special"! See null_from_qvariant_converter in conversions.sip
+      if ( QgsVariantUtils::isNull( v, true ) && v.userType() != QMetaType::Type::QByteArray )
       {
         Py_INCREF( Py_None );
         sipRes = Py_None;
diff --git a/python/core/auto_generated/qgsfeature.sip.in b/python/core/auto_generated/qgsfeature.sip.in
index 2249ab92ca8..98612c754f7 100644
--- a/python/core/auto_generated/qgsfeature.sip.in
+++ b/python/core/auto_generated/qgsfeature.sip.in
@@ -57,7 +57,8 @@ geometry and a list of field/values attributes.
         Py_INCREF( Py_None );
         sipRes = Py_None;
       }
-      else if ( QgsVariantUtils::isNull( v, true ) )
+      // QByteArray null handling is "special"! See null_from_qvariant_converter in conversions.sip
+      else if ( QgsVariantUtils::isNull( v, true ) && v.userType() != QMetaType::Type::QByteArray )
       {
         PyObject *vartype = sipConvertFromEnum( v.type(), sipType_QVariant_Type );
         PyObject *args = PyTuple_Pack( 1, vartype );
@@ -128,7 +129,8 @@ geometry and a list of field/values attributes.
         Py_INCREF( Py_None );
         sipRes = Py_None;
       }
-      else if ( QgsVariantUtils::isNull( v, true ) )
+      // QByteArray null handling is "special"! See null_from_qvariant_converter in conversions.sip
+      else if ( QgsVariantUtils::isNull( v, true ) && v.userType() != QMetaType::Type::QByteArray )
       {
         PyObject *vartype = sipConvertFromEnum( v.type(), sipType_QVariant_Type );
         PyObject *args = PyTuple_Pack( 1, vartype );
diff --git a/src/core/qgsfeature.h b/src/core/qgsfeature.h
index 3396562bf72..8b538705df9 100644
--- a/src/core/qgsfeature.h
+++ b/src/core/qgsfeature.h
@@ -96,7 +96,8 @@ class CORE_EXPORT QgsFeature
         Py_INCREF( Py_None );
         sipRes = Py_None;
       }
-      else if ( QgsVariantUtils::isNull( v, true ) )
+      // QByteArray null handling is "special"! See null_from_qvariant_converter in conversions.sip
+      else if ( QgsVariantUtils::isNull( v, true ) && v.userType() != QMetaType::Type::QByteArray )
       {
         PyObject *vartype = sipConvertFromEnum( v.type(), sipType_QVariant_Type );
         PyObject *args = PyTuple_Pack( 1, vartype );
@@ -167,7 +168,8 @@ class CORE_EXPORT QgsFeature
         Py_INCREF( Py_None );
         sipRes = Py_None;
       }
-      else if ( QgsVariantUtils::isNull( v, true ) )
+      // QByteArray null handling is "special"! See null_from_qvariant_converter in conversions.sip
+      else if ( QgsVariantUtils::isNull( v, true ) && v.userType() != QMetaType::Type::QByteArray )
       {
         PyObject *vartype = sipConvertFromEnum( v.type(), sipType_QVariant_Type );
         PyObject *args = PyTuple_Pack( 1, vartype );
@@ -236,7 +238,8 @@ class CORE_EXPORT QgsFeature
     else
     {
       const QVariant v = sipCpp->attribute( a0 );
-      if ( QgsVariantUtils::isNull( v, true ) )
+      // QByteArray null handling is "special"! See null_from_qvariant_converter in conversions.sip
+      if ( QgsVariantUtils::isNull( v, true ) && v.userType() != QMetaType::Type::QByteArray )
       {
         Py_INCREF( Py_None );
         sipRes = Py_None;
@@ -298,7 +301,8 @@ class CORE_EXPORT QgsFeature
     else
     {
       const QVariant v = sipCpp->attribute( fieldIdx );
-      if ( QgsVariantUtils::isNull( v, true ) )
+      // QByteArray null handling is "special"! See null_from_qvariant_converter in conversions.sip
+      if ( QgsVariantUtils::isNull( v, true ) && v.userType() != QMetaType::Type::QByteArray )
       {
         Py_INCREF( Py_None );
         sipRes = Py_None;