diff --git a/lib_com/ivas_prot_fx.h b/lib_com/ivas_prot_fx.h
index bceefbb76a93a3bc021ed91ec7b1c2e99149d1f8..43a0375fe8c020e6ce25d401ebb70df82543392e 100644
--- a/lib_com/ivas_prot_fx.h
+++ b/lib_com/ivas_prot_fx.h
@@ -1412,7 +1412,12 @@ void stereo_icBWE_dec_fx(
     const Word16 *fb_synth_ref_fx,  /* i  : ref. high-band synthesis 16-20 kHz              */
     const Word16 *voice_factors_fx, /* i  : voicing factors                                 */
     const Word16 output_frame,      /* i  : frame length                                    */
-    Word16 *Q_syn );
+    Word16 *Q_syn
+#ifdef FIX_839_FB_CONTENT_SOMETIME_MISSING
+    ,
+    const Word16 Q_white_exc /* i  : Q of fb_synth_ref_fx                 */
+#endif
+);
 
 void decoder_tcx_tns_fx(
     Decoder_State *st,         /* i/o: coder memory state                      */
diff --git a/lib_com/options.h b/lib_com/options.h
index e87c8d25785eb308846f6f5b699ab3466ab06918..1fbc63cc6f82990df3cd96c6213706e646ce6b2e 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -159,6 +159,8 @@
 #define FIX_833_CORRECTION_to_826                   /* VA : fix indexing error introduced in 826 */
 #endif
 #define NONE_BE_FIX_816_LFE_PLC_FLOAT                   /* DLB: issue 816: reduce required precision to float for LFE-PLC*/
+#define FIX_839_FB_CONTENT_SOMETIME_MISSING     /* VA : Fix scaling error for FB TB BWE */
+
 /* ################## End DEVELOPMENT switches ######################### */
 
 /* clang-format on */
diff --git a/lib_dec/ivas_core_dec.c b/lib_dec/ivas_core_dec.c
index 17a1fcce22945b8cf0ea1f6d90274215f1a841c4..95839cc7a60422a11bc0f2b1bc46a2cc74dbf9c4 100644
--- a/lib_dec/ivas_core_dec.c
+++ b/lib_dec/ivas_core_dec.c
@@ -1255,8 +1255,12 @@ ivas_error ivas_core_dec_fx(
                 hCPE->hStereoDft->td_gain_fx[0] = 1;
                 move32();
             }
-            Scale_sig( tmp_buffer_fx, L_FRAME48k, sub( Q11, Q_white_exc ) );
+#ifndef FIX_839_FB_CONTENT_SOMETIME_MISSING
+            Scale_sig( tmp_buffer_fx, L_FRAME48k, sub( Q11, Q_white_exc ) ); // for small value, this was just mostly p
             stereo_icBWE_dec_fx( hCPE, hb_synth_32_fx[0], hb_synth_32_fx[1], tmp_buffer_fx /*fb_synth_ref*/, voice_factors_fx[0], output_frame, &q );
+#else
+            stereo_icBWE_dec_fx( hCPE, hb_synth_32_fx[0], hb_synth_32_fx[1], tmp_buffer_fx /*fb_synth_ref*/, voice_factors_fx[0], output_frame, &q, Q_white_exc );
+#endif
 #ifdef MSAN_FIX
             test();
             test();
diff --git a/lib_dec/ivas_stereo_icbwe_dec.c b/lib_dec/ivas_stereo_icbwe_dec.c
index 89faf3559193ee32776072164ada2fa0a06615d3..47da57810e32fc0984d4f727f5de20e4e540ead5 100644
--- a/lib_dec/ivas_stereo_icbwe_dec.c
+++ b/lib_dec/ivas_stereo_icbwe_dec.c
@@ -556,10 +556,14 @@ void stereo_icBWE_dec_fx(
     CPE_DEC_HANDLE hCPE,            /* i/o: CPE decoder structure                           */
     Word32 *synthRef_fx,            /* i/o: Reference channel HB synthesis at output Fs      Q11 */
     Word32 *synth_fx,               /* o  : Non reference channel HB synthesis at output Fs  Q11 */
-    const Word16 *fb_synth_ref_fx,  /* i  : ref. high-band synthesis 16-20 kHz               Q11 */
+    const Word16 *fb_synth_ref_fx,  /* i  : ref. high-band synthesis 16-20 kHz               fb_synth_ref_fx */
     const Word16 *voice_factors_fx, /* i  : voicing factors                                  Q15 */
     const Word16 output_frame,      /* i  : frame length                                    */
     Word16 *Q_syn                   /* i  : Q of synth and synthRef buffers                 */
+#ifdef FIX_839_FB_CONTENT_SOMETIME_MISSING
+    ,
+    const Word16 Q_white_exc /* i  : Q of fb_synth_ref_fx                 */
+#endif
 )
 {
     Word16 i, j, k, nbSubFr;
@@ -1330,11 +1334,22 @@ void stereo_icBWE_dec_fx(
     {
 
         // v_add( fb_synth_nonref_fx, synth_fx, synth_fx, L_FRAME48k, 0 );
+#ifdef FIX_839_FB_CONTENT_SOMETIME_MISSING
+        tmp = shl_sat( 1, sub( Q11 + 15, Q_white_exc ) );
+        IF( tmp != 0 )
+        {
+            FOR( i = 0; i < L_FRAME48k; i++ )
+            {
+                synth_fx[i] = L_mac( synth_fx[i], fb_synth_nonref_fx[i], tmp );
+            }
+        }
+#else
         FOR( i = 0; i < L_FRAME48k; i++ )
         {
             synth_fx[i] = L_add( synth_fx[i], L_deposit_l( fb_synth_nonref_fx[i] ) );
             move32();
         }
+#endif
     }
 
     /* copy to outputHB and reset hb_synth values */
diff --git a/lib_dec/swb_tbe_dec_fx.c b/lib_dec/swb_tbe_dec_fx.c
index 091915667571a8d7c23df57c502fd0766bc5d713..eceaa1eafb1b6ad3143ee625b23a459b268011aa 100644
--- a/lib_dec/swb_tbe_dec_fx.c
+++ b/lib_dec/swb_tbe_dec_fx.c
@@ -4957,7 +4957,11 @@ void fb_tbe_dec_ivas_fx(
     test();
     IF( GE_16( st->element_mode, IVAS_CPE_DFT ) && ( st->idchan == 0 ) )
     {
+#ifdef FIX_839_FB_CONTENT_SOMETIME_MISSING
+        Copy_Scale_sig( fb_synth, fb_synth_ref, L_FRAME48k, sub( Q_fb_synth_ref, add( hb_synth_exp, 16 ) ) ); // scaling is required
+#else
         Copy_Scale_sig( fb_synth, fb_synth_ref, L_FRAME48k, sub( Q_fb_synth_ref, hb_synth_exp ) ); // scaling is required
+#endif
     }
     /* add the fb_synth component to the hb_synth component */
     /*  v_add_fx( hb_synth, fb_synth, hb_synth, L_FRAME48k );*/