diff --git a/lib_com/options.h b/lib_com/options.h
index 52ae37685e24a3cd62161254e6010b8b5613fd37..ee8c6be3a9aa0af714ecc976f86e5934592bbd16 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -101,6 +101,7 @@
 #define FIX_2264_OUT_OF_BOUND_READING_IN_LOG2_NORM_LC   /* VA: Fix issue 2264 by adding a proper safeguard in log2 and by adding a missing normalization in swb_pre_proc_ivas_fx()*/
 #define FIX_2250_LARGE_DIFFERENCES_BETWEEN_BASOP_AND_FLOAT  /* Dolby: Issue 2250:  random vector generation in GenShapedSHBExcitation() */
 #define FIX_2254_IMPROV_PRECISION_OR_COMPLEXITY_NON_BE  /* VA: Precision improvement without increasing complexity, or complexity reduction that might be not BE on the LSB */
+#define FIX_2252_LP_CNG_STARTS_SID                      /* VA: issues 2251 and 2252: fix LP CNG uninitialized value in bitstream that starts with an SID */
 
 /* ##################### End NON-BE switches ########################### */
 
diff --git a/lib_dec/decision_matrix_dec_fx.c b/lib_dec/decision_matrix_dec_fx.c
index 1bd406e7a78568ba835ccb8a98d87b0a998fddfd..cddc163147a47c1fed76a5905838b3a80495613c 100644
--- a/lib_dec/decision_matrix_dec_fx.c
+++ b/lib_dec/decision_matrix_dec_fx.c
@@ -76,10 +76,19 @@ void decision_matrix_dec_fx(
                     move16();
 
                     tmp16 = get_next_indice_fx( st, 1 ); // Q0
+#ifdef FIX_2252_TD_CNG_STARTS_SID
+                    IF( EQ_16( tmp16, 1 ) )
+#else
                     if ( EQ_16( tmp16, 1 ) )
+#endif
                     {
                         st->L_frame = L_FRAME16k;
                         move16();
+#ifdef FIX_2252_LP_CNG_STARTS_SID
+                        st->nb_subfr = NB_SUBFR16k;
+                        move16();
+                        st->bwidth = s_max( st->bwidth, WB );
+#endif
                     }
                 }
                 ELSE
diff --git a/lib_dec/init_dec_fx.c b/lib_dec/init_dec_fx.c
index 66c49d77699add7903c68ea01f54b65288b38078..baed0184c7db78a367d394b85175e190c88beab3 100644
--- a/lib_dec/init_dec_fx.c
+++ b/lib_dec/init_dec_fx.c
@@ -91,12 +91,36 @@ ivas_error init_decoder_fx(
     move16();
     st_fx->ini_frame = 0;
     move16();
+#ifdef FIX_2252_LP_CNG_STARTS_SID
+    IF( st_fx->element_mode == EVS_MONO )
+    {
+        st_fx->bwidth = NB;
+        move16();
+        st_fx->last_bwidth = NB;
+        move16();
+    }
+    ELSE
+    {
+#if 0 // keep deactivated for the moment to keep BE
+        st_fx->bwidth = WB;
+        move16();
+        st_fx->last_bwidth = WB;
+#else
+        st_fx->bwidth = NB;
+        move16();
+        st_fx->last_bwidth = NB;
+#endif
+        move16();
+    }
+#else
     st_fx->bwidth = NB;
     move16();
     st_fx->last_bwidth = NB;
     move16();
+#endif
     st_fx->extl_brate = 0;
     move16();
+
     st_fx->coder_type = GENERIC; /* low-rate mode flag */
     move16();
     st_fx->last_coder_type = GENERIC;
diff --git a/lib_dec/ivas_decision_matrix_dec_fx.c b/lib_dec/ivas_decision_matrix_dec_fx.c
index 4ba2a386af868d3e2704f59ad6af93f1bc593e0b..fadd9d008a8a9fede030a54c86ebc8e2b76fce76 100644
--- a/lib_dec/ivas_decision_matrix_dec_fx.c
+++ b/lib_dec/ivas_decision_matrix_dec_fx.c
@@ -115,6 +115,11 @@ void ivas_decision_matrix_dec_fx(
             {
                 st->L_frame = L_FRAME16k;
                 move16();
+#ifdef FIX_2252_LP_CNG_STARTS_SID
+                st->nb_subfr = NB_SUBFR16k;
+                move16();
+                st->bwidth = s_max( st->bwidth, WB );
+#endif
             }
             ELSE
             {