diff --git a/include/etl/unordered_map.h b/include/etl/unordered_map.h
index 7dabff95..c74fce4a 100644
--- a/include/etl/unordered_map.h
+++ b/include/etl/unordered_map.h
@@ -663,6 +663,8 @@ namespace etl
 
       pbucket->insert_after(pbucket->before_begin(), node);
 
+      adjust_first_last_markers_after_insert(pbucket);
+
       return pbucket->begin()->key_value_pair.second;
     }
 
@@ -791,10 +793,10 @@ namespace etl
         // Just add the pointer to the bucket;
         bucket.insert_after(bucket.before_begin(), node);
 
+        adjust_first_last_markers_after_insert(pbucket);
+
         result.first = iterator((pbuckets + number_of_buckets), pbucket, pbucket->begin());
         result.second = true;
-
-        adjust_first_last_markers(pbucket);
       }
       else
       {
@@ -824,6 +826,7 @@ namespace etl
 
           // Add the node to the end of the bucket;
           bucket.insert_after(inode_previous, node);
+          adjust_first_last_markers_after_insert(&bucket);
           ++inode_previous;
 
           result.first = iterator((pbuckets + number_of_buckets), pbucket, inode_previous);
@@ -889,6 +892,7 @@ namespace etl
         bucket.erase_after(iprevious);          // Unlink from the bucket.
         icurrent->key_value_pair.~value_type(); // Destroy the value.
         pnodepool->release(&*icurrent);         // Release it back to the pool.
+        adjust_first_last_markers_after_erase(&bucket);
         n = 1;
         ETL_DECREMENT_DEBUG_COUNT
       }
@@ -919,6 +923,7 @@ namespace etl
       bucket.erase_after(iprevious);          // Unlink from the bucket.
       icurrent->key_value_pair.~value_type(); // Destroy the value.
       pnodepool->release(&*icurrent);         // Release it back to the pool.
+      adjust_first_last_markers_after_erase(&bucket);
       ETL_DECREMENT_DEBUG_COUNT
 
       return inext;
@@ -954,6 +959,7 @@ namespace etl
         local_iterator inext = pbucket->erase_after(iprevious); // Unlink from the bucket.
         icurrent->key_value_pair.~value_type(); // Destroy the value.
         pnodepool->release(&*icurrent);         // Release it back to the pool.
+        adjust_first_last_markers_after_erase(pbucket);
         ETL_DECREMENT_DEBUG_COUNT
 
         icurrent = inext;
@@ -1245,15 +1251,68 @@ namespace etl
     //*********************************************************************
     /// Adjust the first and last markers according to the new entry.
     //*********************************************************************
-    void adjust_first_last_markers(bucket_t* pbucket)
+    void adjust_first_last_markers_after_insert(bucket_t* pbucket)
     {
-      if (pbucket < first)
+      if (size() == 1)
       {
         first = pbucket;
+        last  = pbucket;
       }
-      else if (pbucket > last)
+      else
       {
-        last = pbucket;
+        if (pbucket < first)
+        {
+          first = pbucket;
+        }
+        else if (pbucket > last)
+        {
+          last = pbucket;
+        }
+      }
+    }
+
+    //*********************************************************************
+    /// Adjust the first and last markers according to the erased entry.
+    //*********************************************************************
+    void adjust_first_last_markers_after_erase(bucket_t* pbucket)
+    {
+      if (empty())
+      {
+        first = pbuckets;
+        last  = pbuckets;
+      }
+      else
+      {
+        if (pbucket == first)
+        {         
+          // We erased the first so, we need to search again from where we erased.
+          while (first->empty())
+          {
+            ++first;
+          }
+        }
+        else if (pbucket == last)
+        {
+          // We erased the last, so we need to search again. Start from the first, go no further than the current last.
+          bucket_t* pbucket = first;
+          bucket_t* pend = last;
+
+          last = first;
+
+          while (pbucket != pend)
+          {
+            if (!pbucket->empty())
+            {
+              last = pbucket;
+            }
+
+            ++pbucket;
+          }
+        }
+        else
+        {
+          // Nothing to do.
+        }
       }
     }
 
diff --git a/include/etl/version.h b/include/etl/version.h
index 0fc8a57d..35a86903 100644
--- a/include/etl/version.h
+++ b/include/etl/version.h
@@ -39,7 +39,7 @@ SOFTWARE.
 
 #define ETL_VERSION_MAJOR 14
 #define ETL_VERSION_MINOR 10
-#define ETL_VERSION_PATCH  0
+#define ETL_VERSION_PATCH  1
 
 #define ETL_VERSION       ETL_STRINGIFY(ETL_VERSION_MAJOR) ETL_STRINGIFY(ETL_VERSION_MINOR) ETL_STRINGIFY(ETL_VERSION_PATCH)
 #define ETL_VERSION_W     ETL_WIDE_STRING(ETL_CONCAT(ETL_CONCAT(ETL_VERSION_MAJOR, ETL_VERSION_MINOR), ETL_VERSION_PATCH))
diff --git a/support/Release notes.txt b/support/Release notes.txt
index 2aed565d..3dfa22ad 100644
--- a/support/Release notes.txt	
+++ b/support/Release notes.txt	
@@ -1,3 +1,7 @@
+===============================================================================
+14.10.1
+Fix for unordered_map insert and erase bug.
+
 ===============================================================================
 14.10.0
 Added ETL_NOEXCEPT macros.
diff --git a/test/test_unordered_map.cpp b/test/test_unordered_map.cpp
index eff6662d..fb03c947 100644
--- a/test/test_unordered_map.cpp
+++ b/test/test_unordered_map.cpp
@@ -28,6 +28,8 @@ SOFTWARE.
 
 #include "UnitTest++.h"
 
+#include <sstream>
+
 #include <map>
 #include <array>
 #include <algorithm>
@@ -687,9 +689,35 @@ namespace
     }
 
     //*************************************************************************
-    TEST_FIXTURE(SetupFixture, test_release)
+    TEST_FIXTURE(SetupFixture, test_insert_and_erase_bug)
     {
+      etl::unordered_map<uint32_t, char, 5> map;
 
+      map[1] = 'b';
+      map[2] = 'c';
+      map[3] = 'd';
+      map[4] = 'e';
+
+      auto it = map.find(1);
+      map.erase(it);
+      
+      it = map.find(4);
+      map.erase(it);
+
+      std::vector<std::string> s;
+
+      for (const auto &kv : map) 
+      {
+        std::stringstream ss;
+        ss << "map[" << kv.first << "] = " << kv.second;
+        s.push_back(ss.str());
+      }
+
+      CHECK_EQUAL(2, s.size());
+      CHECK_EQUAL("map[2] = c", s[0]);
+      CHECK_EQUAL("map[3] = d", s[1]);
+      CHECK_EQUAL('c', map[2]);
+      CHECK_EQUAL('d', map[3]);
     }
   };
 }