diff --git a/lib_com/options.h b/lib_com/options.h
index 4cc8145f9f4b763b78d3d53a380383aa5c43dae0..9473a7cc22bd2f34a9d5d4b7cfb26b587897199c 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -175,6 +175,7 @@
 #define NONBE_1122_KEEP_EVS_MODE_UNCHANGED              /* FhG: Disables fix for issue 1122 in EVS mode to keep BE tests green. This switch should be removed once the 1122 fix is added to EVS via a CR.  */
 #define NONBE_1250_MCMASA_LS_OUTPUT                     /* VA: issue 1250: fix crash in McMASA to custom LS output decoding */
 #define NONBE_1302_FIX_OMASA_JBM_FLUSH                  /* VA: issue 1302: fix OMASA JBM bitrate switching flush in binaural output */
+#define NONBE_1324_TC_BUFFER_MEMOERY_KEEP               /* VA: issue 1324: do not reset TSM memory in JBM bitrate switching */
 
 /* ##################### End NON-BE switches ########################### */
 
diff --git a/lib_dec/ivas_jbm_dec.c b/lib_dec/ivas_jbm_dec.c
index 7efcab2f6be49e4810ab50bb8d0a718bec00c7a7..2c6a571c75c529410b464bcd0da9a1ddc21dd4f0 100644
--- a/lib_dec/ivas_jbm_dec.c
+++ b/lib_dec/ivas_jbm_dec.c
@@ -2262,11 +2262,35 @@ ivas_error ivas_jbm_dec_tc_buffer_reconfigure(
     const int16_t n_samples_granularity     /* i  : new granularity of the renderer/buffer  */
 )
 {
+#ifdef NONBE_1324_TC_BUFFER_MEMOERY_KEEP
+    int16_t ch_idx, num_tc_buffer_mem, n_samples_still_available;
+    float tc_buffer_mem[MAX_INTERN_CHANNELS][L_FRAME48k / MAX_PARAM_SPATIAL_SUBFRAMES - 1];
+#endif
     ivas_error error;
     DECODER_TC_BUFFER_HANDLE hTcBuffer;
 
     hTcBuffer = st_ivas->hTcBuffer;
 
+#ifdef NONBE_1324_TC_BUFFER_MEMOERY_KEEP
+    num_tc_buffer_mem = 0;
+    n_samples_still_available = 0;
+
+    if ( st_ivas->hDecoderConfig->Opt_tsm )
+    {
+        /* save samples of the TC buffer from the previous frame */
+        num_tc_buffer_mem = min( hTcBuffer->nchan_transport_internal, nchan_transport_internal );
+        n_samples_still_available = hTcBuffer->n_samples_buffered - hTcBuffer->n_samples_rendered;
+
+        /* what is remaining from last frame needs always be smaller than the new granularity */
+        assert( n_samples_still_available < n_samples_granularity );
+
+        for ( ch_idx = 0; ch_idx < num_tc_buffer_mem; ch_idx++ )
+        {
+            mvr2r( hTcBuffer->tc_buffer_old[ch_idx] + hTcBuffer->n_samples_flushed, tc_buffer_mem[ch_idx], n_samples_still_available );
+        }
+    }
+
+#endif
     /* if granularity changes, adapt subframe_nb_slots */
     if ( n_samples_granularity != hTcBuffer->n_samples_granularity )
     {
@@ -2306,11 +2330,12 @@ ivas_error ivas_jbm_dec_tc_buffer_reconfigure(
     hTcBuffer->nchan_buffer_full = nchan_full;
     hTcBuffer->n_samples_granularity = n_samples_granularity;
 
+#ifndef NONBE_1324_TC_BUFFER_MEMOERY_KEEP
 #ifdef DEBUGGING
     /* what is remaining from last frames needs always be smaller than n_samples_granularity */
     assert( ( hTcBuffer->n_samples_buffered - hTcBuffer->n_samples_rendered ) < n_samples_granularity );
 #endif
-
+#endif
     /* reallocate TC audio buffers */
 
     ivas_jbm_dec_tc_audio_deallocate( hTcBuffer );
@@ -2320,6 +2345,14 @@ ivas_error ivas_jbm_dec_tc_buffer_reconfigure(
         return error;
     }
 
+#ifdef NONBE_1324_TC_BUFFER_MEMOERY_KEEP
+    /* propagate samples of the TC buffer from the previous frame */
+    for ( ch_idx = 0; ch_idx < num_tc_buffer_mem; ch_idx++ )
+    {
+        mvr2r( tc_buffer_mem[ch_idx], hTcBuffer->tc_buffer_old[ch_idx], n_samples_still_available );
+    }
+
+#endif
     return IVAS_ERR_OK;
 }