diff --git a/lib_com/options.h b/lib_com/options.h
index 8eabb752669c2394428f3a67503bcbe7fc344aea..50743d32d79c024f1c349ed80a45a5a01307cd0f 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -173,6 +173,7 @@
 #define NONBE_FIX_904_JBM_SBA_RS_FOA                          /* FhG: issue #904: fix JBM SBA RS to FOA decoding */
 #define NONBE_FIX_898_ISM_BRATE_CRASH                         /* VA: issue 898: fix decoder crash in ISM bitrate switching with DTX and binaural output */
 #define NONBE_FIX_862_UBSAN_SPAR_DEC_BR_SW_PLC                /* DLB: issue 862 : UBSAN: out-of-bound error in SPAR for OSBA bitrate switching with PLC*/
+#define NONBE_FIX_DISCRETE_ISM_NOISE_SEED_HANDLING            /* FhG: fix handling of common and differing noise seeds in SCEs for ISM DTX */
 
 /* ##################### End NON-BE switches ########################### */
 
diff --git a/lib_dec/fd_cng_dec.c b/lib_dec/fd_cng_dec.c
index 5e36f024f8507f402390b9863c88408ffbc90bb3..348cfd1227746158a630aebf6f3f9669431d7eab 100644
--- a/lib_dec/fd_cng_dec.c
+++ b/lib_dec/fd_cng_dec.c
@@ -1104,10 +1104,17 @@ void generate_comfort_noise_dec(
     c2 = (float) sqrt( 1 - hFdCngCom->coherence );
 
     seed2 = &( hFdCngCom->seed2 );
+#ifdef NONBE_FIX_DISCRETE_ISM_NOISE_SEED_HANDLING
+    if ( st->element_mode == IVAS_CPE_MDCT && st->idchan == 1 )
+    {
+        seed2 = &( hFdCngCom->seed3 );
+    }
+#else
     if ( ( st->element_mode == IVAS_CPE_MDCT && st->idchan == 1 ) || ( st->element_mode == IVAS_SCE && st->cng_ism_flag ) )
     {
         seed2 = &( hFdCngCom->seed3 );
     }
+#endif
 
     /* Generate Gaussian random noise in real and imaginary parts of the FFT bins
       Amplitudes are adjusted to the estimated noise level cngNoiseLevel in each bin */
@@ -1354,11 +1361,16 @@ void generate_comfort_noise_dec_hf(
     float scale = CLDFB_SCALING / hFdCngCom->scalingFactor;
 
     int16_t *seed2 = &( hFdCngCom->seed );
+
     float tmp1, tmp2, c1 = 0.f, c2 = 0.f;
 
     if ( cng_coh_flag )
     {
+#ifdef NONBE_FIX_DISCRETE_ISM_NOISE_SEED_HANDLING
+        seed2 = &( hFdCngCom->seed2 );
+#else
         seed2 = &( hFdCngCom->seed3 );
+#endif
 
         c1 = (float) sqrt( hFdCngCom->coherence );
         c2 = (float) sqrt( 1 - hFdCngCom->coherence );
diff --git a/lib_dec/ivas_init_dec.c b/lib_dec/ivas_init_dec.c
index 7c1d81b6b818fc3ff963b30a402722793063e321..a2e53ceb064b6750940bfe0b318fcd72f12db637 100644
--- a/lib_dec/ivas_init_dec.c
+++ b/lib_dec/ivas_init_dec.c
@@ -1361,10 +1361,24 @@ ivas_error ivas_init_decoder(
 
         st_ivas->hISMDTX.sce_id_dtx = 0;
 
+#ifdef NONBE_FIX_DISCRETE_ISM_NOISE_SEED_HANDLING
+        if ( st_ivas->ism_mode == ISM_MODE_PARAM )
+        {
+            st_ivas->hSCE[0]->hCoreCoder[0]->hFdCngDec->hFdCngCom->seed2 = st_ivas->hSCE[0]->hCoreCoder[0]->hFdCngDec->hFdCngCom->seed3;
+        }
+        else if ( st_ivas->ism_mode == ISM_MODE_DISC )
+        {
+            for ( sce_id = 0; sce_id < st_ivas->nSCE; ++sce_id )
+            {
+                st_ivas->hSCE[sce_id]->hCoreCoder[0]->hFdCngDec->hFdCngCom->seed2 = 2 + sce_id;
+            }
+        }
+#else
         if ( st_ivas->ism_mode == ISM_MODE_PARAM )
         {
             st_ivas->hSCE[1]->hCoreCoder[0]->hFdCngDec->hFdCngCom->seed3 = st_ivas->hSCE[0]->hCoreCoder[0]->hFdCngDec->hFdCngCom->seed2;
         }
+#endif
     }
     else if ( st_ivas->ivas_format == SBA_FORMAT )
     {
diff --git a/lib_dec/ivas_ism_dtx_dec.c b/lib_dec/ivas_ism_dtx_dec.c
index 446b9aa9e42801cfabb7eebc8c75b07c19bcd5b4..1c53749d7bc3c893bb9cee027ba57f1717e8c9ab 100644
--- a/lib_dec/ivas_ism_dtx_dec.c
+++ b/lib_dec/ivas_ism_dtx_dec.c
@@ -154,6 +154,17 @@ ivas_error ivas_ism_dtx_dec(
         }
     }
 
+#ifdef NONBE_FIX_DISCRETE_ISM_NOISE_SEED_HANDLING
+    /* synch common seed between SCEs */
+    if ( st_ivas->ism_mode == ISM_MODE_DISC )
+    {
+        for ( ch = 0; ch < nchan_ism; ++ch )
+        {
+            st_ivas->hSCE[ch]->hCoreCoder[0]->hFdCngDec->hFdCngCom->seed = st_ivas->hSCE[st_ivas->hISMDTX.sce_id_dtx]->hCoreCoder[0]->hFdCngDec->hFdCngCom->seed;
+        }
+    }
+#endif
+
     update_last_metadata( nchan_ism, st_ivas->hIsmMetaData, md_diff_flag );
 
     st_ivas->hISMDTX.ism_dtx_hangover_cnt = 0;