diff --git a/lib_com/options.h b/lib_com/options.h
index 965e181727ff38eccaea67edebc1a8074b626c87..6e0851258a6a7a8daa4790c1094257c42cc2166a 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -167,6 +167,7 @@
 #define NONBE_FIX_943_PORT_1208_DFT_STEREO_PLC_BURST    /* Ericsson: BASOP Issue 943, Float Issue 1208, fix for overflow of sample offset counter for burst error in DFT Stereo PLC. */
 #define FIX_903_ZERO_OUT_IMDCT_BUFFERS_FOR_MCT_IGNORE   /* FhG: zero out all relevant imdct buffers in MCT decoding of channels with mct_chan_mode == MCT_CHAN_MODE_IGNORE */
 #define FIX_853_DECODE_MASA_ISM_AZIMUTH_PREC_FP        /* Nokia: Fixes ivas_decode_masaism_metadata decision logic change due to precision difference; this is the fix in floating point */
+#define NONBE_FIX_1205_TD_STEREO_MOD_CT                 /* VA: fix mismatch of coder_type (mod_ct) btw. TD stereo encoder and decoder */
 /* #################### End FIXES switches ############################ */
 
 #define BASOP_NOGLOB                                    /* Disable global symbols in BASOPs, Overflow/Carry in BASOPs disabled, additional BASOPs in case of Overflow */
diff --git a/lib_dec/ivas_stereo_td_dec.c b/lib_dec/ivas_stereo_td_dec.c
index 41018cae2542af3ed3962c5c59e3d61fdcb0ddfd..545d2b0697a7322cbbdf2edc69508842b938f6fc 100644
--- a/lib_dec/ivas_stereo_td_dec.c
+++ b/lib_dec/ivas_stereo_td_dec.c
@@ -251,7 +251,6 @@ void tdm_configure_dec(
     }
 
 #ifdef DEBUG_MODE_TD
-    dbgwrite( &mod_ct, 2, 1, 320, "res/mod_ct.dec" );
     dbgwrite( tdm_ratio_idx, 2, 1, 320, "res/tdm_ratio_idx.dec" );
     dbgwrite( &tdm_inst_ratio_idx, 2, 1, 320, "res/tdm_inst_ratio_idx.dec" );
     dbgwrite( &hStereoTD->tdm_lp_reuse_flag, 2, 1, 320, "res/tdm_lp_reuse_flag.dec" );
diff --git a/lib_enc/ivas_decision_matrix_enc.c b/lib_enc/ivas_decision_matrix_enc.c
index b9578423b989de2c2c30c38294222a00f018f426..6e4c4978b6ad81dece3ed0d435a1711d15708623 100644
--- a/lib_enc/ivas_decision_matrix_enc.c
+++ b/lib_enc/ivas_decision_matrix_enc.c
@@ -215,7 +215,16 @@ void ivas_decision_matrix_enc(
     if ( st->core == TCX_20_CORE && st->total_brate < STEREO_TCX_MIN_RATE )
     {
         st->core = ACELP_CORE;
+#ifdef NONBE_FIX_1205_TD_STEREO_MOD_CT
+        /* In TD stereo below 24.4 kbps we cannot overwrite the `coder_type` when it is set to TRANSITION, */
+        /* as it is used for TD stereo bit allocation. To ensure consistent bit allocation, it must remain unchanged on the decoder side. */
+        if ( st->idchan == 0 && !( element_brate < IVAS_24k4 && st->coder_type == TRANSITION && st->element_mode == IVAS_CPE_TD ) )
+        {
+            st->coder_type = AUDIO;
+        }
+#else
         st->coder_type = AUDIO;
+#endif
         st->sp_aud_decision2 = 0;
 
         if ( st->low_rate_mode )
@@ -465,6 +474,16 @@ void ivas_signaling_enc(
 
                 if ( st->core == ACELP_CORE )
                 {
+#ifdef NONBE_FIX_1205_TD_STEREO_MOD_CT
+                    /* write coder type */
+                    push_indice( hBstr, IND_ACELP_SIGNALLING, st->coder_type, 3 );
+
+                    if ( element_brate >= FRMT_SHP_MIN_BRATE_IVAS )
+                    {
+                        /* write sharpening flag */
+                        push_indice( hBstr, IND_SHARP_FLAG, st->sharpFlag, 1 );
+                    }
+#else
                     if ( element_brate < FRMT_SHP_MIN_BRATE_IVAS )
                     {
                         push_indice( hBstr, IND_ACELP_SIGNALLING, st->coder_type, 3 );
@@ -477,6 +496,7 @@ void ivas_signaling_enc(
                         /* write sharpening flag */
                         push_indice( hBstr, IND_SHARP_FLAG, st->sharpFlag, 1 );
                     }
+#endif
 
                     /* write extension layer flag to distinguish between TBE (0) and BWE (1) */
                     if ( st->extl_brate > 0 )
diff --git a/lib_enc/ivas_stereo_td_enc.c b/lib_enc/ivas_stereo_td_enc.c
index 64446f3e518407abb7d25b5e1220fc3d50659708..3778bffedd8e07f06a37a8d156ca0970d7eef943 100644
--- a/lib_enc/ivas_stereo_td_enc.c
+++ b/lib_enc/ivas_stereo_td_enc.c
@@ -449,6 +449,22 @@ void tdm_configure_enc(
     }
 
     mod_ct = AUDIO;
+#ifdef NONBE_FIX_1205_TD_STEREO_MOD_CT
+    if ( hCPE->element_brate < IVAS_24k4 )
+    {
+        /* In TD stereo, the TRANSITION mode has a specific bit allocation. All other formats share the same bit allocation. For these other formats, `mod_ct` is set to AUDIO to aid in debugging, though it does not have any functional impact. */
+        if ( !( sts[0]->localVAD == 0 && sts[0]->coder_type == TRANSITION ) &&
+             ( sts[0]->coder_type == TRANSITION ||
+               ( ( ( sts[0]->last_L_frame >= L_FRAME16k && sts[0]->flag_ACELP16k == 0 ) ||
+                   ( sts[0]->last_L_frame == L_FRAME && sts[0]->flag_ACELP16k == 1 ) ) &&
+                 sts[0]->last_core_brate != FRAME_NO_DATA &&
+                 sts[0]->last_core_brate != SID_2k40 &&
+                 sts[0]->coder_type_raw != VOICED ) ) )
+        {
+            mod_ct = TRANSITION;
+        }
+    }
+#else
     if ( hCPE->element_brate < IVAS_24k4 )
     {
         mod_ct = sts[0]->coder_type;
@@ -462,6 +478,7 @@ void tdm_configure_enc(
             mod_ct = AUDIO;
         }
     }
+#endif
 
     /* Correction of tdm_inst_ratio_idx in case of TC in the seecondary channel */
     if ( hStereoTD->flag_skip_DMX == 0 && hStereoTD->tdm_LRTD_flag == 1 && sts[1]->tc_cnt > 1 /*&& abs(hStereoTD->tdm_inst_ratio_idx-LRTD_STEREO_MID_IS_PRIM) > 5*/ )
@@ -549,7 +566,6 @@ void tdm_configure_enc(
 #ifdef DEBUG_MODE_TD
     dbgwrite( &hStereoTD->tdm_low_rate_mode, 2, 1, 320, "res/tdm_low_rate_mode_c" );
     dbgwrite( &hStereoTD->tdm_lp_reuse_flag, 2, 1, 320, "res/tdm_lp_reuse_flag_c" );
-    dbgwrite( &mod_ct, 2, 1, 320, "res/mod_ct.enc" );
 #endif
 
     /*----------------------------------------------------------------*