diff --git a/inference-engine/src/gna_plugin/gna_groups.hpp b/inference-engine/src/gna_plugin/gna_groups.hpp
index 2449338821c..704588a153d 100644
--- a/inference-engine/src/gna_plugin/gna_groups.hpp
+++ b/inference-engine/src/gna_plugin/gna_groups.hpp
@@ -52,13 +52,6 @@ inline bool HasTo2DReshapeData(InferenceEngine::CNNLayerPtr layer) {
     if (!GNAPluginNS::LayerInfo(layer).isSyntheticScaleShift())
         return false;
 
-    // Don't reshape the first dnn layer since it breaks groups recognition
-    auto prevLayer = InferenceEngine::CNNNetPrevLayerSkipCertain(layer, 0, [](InferenceEngine::CNNLayerPtr ptr) {
-        return LayerInfo(ptr).isNonValuesChangable();
-    });
-    IE_ASSERT(prevLayer != nullptr);
-    if (LayerInfo(prevLayer).isInput()) return false;
-
     // Don't reshape diagonallayers with bias connection
     return !GNAPluginNS::LayerInfo(getCreatorLayer(layer->insData.front().lock()).lock()).has32BOutput();
 }
diff --git a/inference-engine/src/gna_plugin/optimizer/gna_pass_manager.cpp b/inference-engine/src/gna_plugin/optimizer/gna_pass_manager.cpp
index b8962cebd36..ef333e7e46f 100644
--- a/inference-engine/src/gna_plugin/optimizer/gna_pass_manager.cpp
+++ b/inference-engine/src/gna_plugin/optimizer/gna_pass_manager.cpp
@@ -85,9 +85,8 @@ static void insertDiagonalLayerBetween(InferenceEngine::CNNLayerPtr prevLayer,
         return LayerInfo(ptr).isNonValuesChangable();
     });
     IE_ASSERT(inputLayer != nullptr);
-    size_t weightsSize = (LayerInfo(prevLayer).has32BOutput() || LayerInfo(inputLayer).isInput()) ?
-                         nextLayer->outData[0]->getDims().back() :
-                         Get2DReshapedData(nextLayer->outData[0], 8)->getDims()[1];
+    size_t weightsSize = LayerInfo(prevLayer).has32BOutput() ? nextLayer->outData[0]->getDims().back() :
+        Get2DReshapedData(nextLayer->outData[0], 8)->getDims()[1];
     std::vector<float> weightsValues(weightsSize, fillValue);
     IE_ASSERT(diagLayer != nullptr);
     diagLayer->_weights = make_shared_blob<float>(
diff --git a/inference-engine/tests/functional/plugin/gna/pass_tests/convert_matmul_to_pointwise_conv.cpp b/inference-engine/tests/functional/plugin/gna/pass_tests/convert_matmul_to_pointwise_conv.cpp
index 7e3d15174f3..86bfe5e25c0 100644
--- a/inference-engine/tests/functional/plugin/gna/pass_tests/convert_matmul_to_pointwise_conv.cpp
+++ b/inference-engine/tests/functional/plugin/gna/pass_tests/convert_matmul_to_pointwise_conv.cpp
@@ -217,8 +217,7 @@ INSTANTIATE_TEST_CASE_P(smoke_ConvertMatmulToPointwiseConvTest, ConvertMatmulToP
         ::testing::ValuesIn(inputShape)),
     ConvertMatmulToPointwiseConv::getTestCaseName);
 
-// Issue 55662
-INSTANTIATE_TEST_CASE_P(DISABLED_smoke_ConvertMatmulToPointwiseConvTest, ConvertMatmulToPointwiseConvWithFq,
+INSTANTIATE_TEST_CASE_P(smoke_ConvertMatmulToPointwiseConvTest, ConvertMatmulToPointwiseConvWithFq,
     ::testing::Combine(
         ::testing::ValuesIn(netPrecisions),
         ::testing::Values(CommonTestUtils::DEVICE_GNA),