diff --git a/lib_com/options.h b/lib_com/options.h
index deb91f1805202dbac31e1ff3f5c43ca9a74531c4..2d1ac97a23bbdb6887f9dea91bf18b498b67a589 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -210,6 +210,9 @@
 #define FIX_I503_ASAN_ERROR_IND_LIST                    /* VA: fix issue #503: address sanitizer error with IND_LIST_DYN */
 #define FIX_473_JITTER_NONDIEGETIC_PANNING              /* FhG,Orange: add missing non-diegetic panning to JITTER */
 
+#ifdef HR_METADATA
+#define FIX_505_MASA_SPHGRID_REUSE                      /* Nokia: Fix issue #505: MASA spherical grid reuse fix */
+#endif
                                                         /* ################## End DEVELOPMENT switches ######################### */
 /* clang-format on */
 
diff --git a/lib_enc/ivas_masa_enc.c b/lib_enc/ivas_masa_enc.c
index 0c768f1a176107342df11f6df965acaa24998ab2..e62a38f3801b9ed3b5fb5d7f6dbc8f6758e63dbb 100644
--- a/lib_enc/ivas_masa_enc.c
+++ b/lib_enc/ivas_masa_enc.c
@@ -65,6 +65,10 @@ static void average_masa_metadata( MASA_METADATA_FRAME *masaMetadata, float ener
 #ifdef HR_METADATA
                                    ,
                                    const SPHERICAL_GRID_DATA *sphGrid
+#ifdef FIX_505_MASA_SPHGRID_REUSE
+                                   ,
+                                   const uint8_t useSphGrid
+#endif
 #endif
 );
 
@@ -505,7 +509,9 @@ ivas_error ivas_masa_enc_config(
 #endif
     ivas_error error;
 #ifdef HR_METADATA
+#ifndef FIX_505_MASA_SPHGRID_REUSE
     SPHERICAL_GRID_DATA *sphGrid;
+#endif
 #endif
 
     error = IVAS_ERR_OK;
@@ -528,6 +534,7 @@ ivas_error ivas_masa_enc_config(
         if ( hMasa->data.sync_state.frame_mode == MASA_FRAME_1SF && hMasa->data.sync_state.prev_offset != 0 )
         {
 #ifdef HR_METADATA
+#ifndef FIX_505_MASA_SPHGRID_REUSE
             if ( ( sphGrid = (SPHERICAL_GRID_DATA *) malloc( sizeof( SPHERICAL_GRID_DATA ) ) ) == NULL )
             {
                 return ( IVAS_ERROR( IVAS_ERR_FAILED_ALLOC, "Can not allocate memory for MASA spherical grid\n" ) );
@@ -541,13 +548,19 @@ ivas_error ivas_masa_enc_config(
             {
                 sphGrid->no_theta = 0;
             }
+#endif
 #endif
 
             /* average over sub-frames */
             average_masa_metadata( &( hMasa->masaMetadata ), hMasa->data.energy
 #ifdef HR_METADATA
                                    ,
+#ifdef FIX_505_MASA_SPHGRID_REUSE
+                                   &( hMasa->data.Sph_Grid16 ),
+                                   ivas_total_brate == IVAS_512k ? TRUE : FALSE
+#else
                                    sphGrid
+#endif
 #endif
             );
         }
@@ -1826,6 +1839,10 @@ static void average_masa_metadata(
 #ifdef HR_METADATA
     ,
     const SPHERICAL_GRID_DATA *Sph_Grid16
+#ifdef FIX_505_MASA_SPHGRID_REUSE
+    ,
+    const uint8_t useSphGrid
+#endif
 #endif
 )
 {
@@ -1875,7 +1892,11 @@ static void average_masa_metadata(
             hMeta->directional_meta[i].azimuth[j][k] = atan2f( y_sum, x_sum ) / EVS_PI * 180.0f;
             hMeta->directional_meta[i].elevation[j][k] = atan2f( z_sum, sqrtf( x_sum * x_sum + y_sum * y_sum ) ) / EVS_PI * 180.0f;
 #ifdef HR_METADATA
+#ifdef FIX_505_MASA_SPHGRID_REUSE
+            if ( useSphGrid == TRUE )
+#else
             if ( Sph_Grid16->no_theta > 0 )
+#endif
             {
                 hMeta->directional_meta[i].spherical_index[j][k] = index_theta_phi_16( &( hMeta->directional_meta[i].elevation[j][k] ),
                                                                                        &( hMeta->directional_meta[i].azimuth[j][k] ), Sph_Grid16 );