diff --git a/lib_com/options.h b/lib_com/options.h
index ccb4558dba698312b0c7c4d03b3530e08a044adb..e1b51996f86cc3458c921f09d7c17f2660de0b90 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -149,6 +149,8 @@
 #define FIX_FIX_I59                                     /* Issue 59:  small fix concerning LFE delay rounding */
 #define FIX_197_CREND_INTERFACE 
 #define SET_TNS_FLAG_IN_EVERY_FRAME                     /* FhG: issue 288 - mismatch between encoder and decoder wrt TNS usage in unified stereo  with frameloss */
+#define FIX_299_ISM_BWS                                 /* VA: issue 299 - fix Band-width switching issues in ISM format */
+
 
 /* ################## End DEVELOPMENT switches ######################### */
 /* clang-format on */
diff --git a/lib_dec/core_switching_dec.c b/lib_dec/core_switching_dec.c
index c79ecfacbde5104f4e5280c2c1598b3c40ea6c03..6ea717d07ea5543a3d8ef45b880bc8332c138d3b 100644
--- a/lib_dec/core_switching_dec.c
+++ b/lib_dec/core_switching_dec.c
@@ -1028,7 +1028,11 @@ void bandwidth_switching_detect(
     {
         st->bws_cnt1 = 0;
     }
-    else if ( st->total_brate > ACELP_9k60 && st->last_core_brate < ACELP_9k60 && st->bwidth == SWB && st->last_bwidth == WB )
+    else if ( st->total_brate > ACELP_9k60 && st->last_core_brate < ACELP_9k60 && st->bwidth == SWB && st->last_bwidth == WB
+#ifdef FIX_299_ISM_BWS
+              && st->last_low_rate_mode == 0
+#endif
+    )
     {
         st->bws_cnt1++;
     }
diff --git a/lib_dec/init_dec.c b/lib_dec/init_dec.c
index d7862d2c56a46c7de3989d10f73195c6a2aa2181..05183e12f587add5b95c0247abc4c56afbbc537c 100644
--- a/lib_dec/init_dec.c
+++ b/lib_dec/init_dec.c
@@ -107,6 +107,9 @@ ivas_error init_decoder(
     st->last_good = UNVOICED_CLAS;
     st->clas_dec = UNVOICED_CLAS;
     st->low_rate_mode = 0;
+#ifdef FIX_299_ISM_BWS
+    st->last_low_rate_mode = 0;
+#endif
 
     st->lp_gainp = 0.0f;
     st->lp_gainc = 0.0f;
diff --git a/lib_dec/stat_dec.h b/lib_dec/stat_dec.h
index eee29406f6d5f3fb012e51e67d6b0dac678fcbb1..8bd367814fd111d6366cc60b296599745adef528 100644
--- a/lib_dec/stat_dec.h
+++ b/lib_dec/stat_dec.h
@@ -934,6 +934,9 @@ typedef struct Decoder_State
     int16_t ini_frame;               /* initialization frames counter */
     int16_t prev_coder_type;         /* coding type of last frame */
     int16_t low_rate_mode;           /* low-rate mode flag */
+#ifdef FIX_299_ISM_BWS
+    int16_t last_low_rate_mode; /* previous frame low-rate mode flag */
+#endif
 
     /*----------------------------------------------------------------------------------*
      * ACELP core parameters
diff --git a/lib_dec/updt_dec.c b/lib_dec/updt_dec.c
index 1103a36d9f975e63c27bc44ade10fc6c1fb5858c..81f4027221fa6fefcc08ee46997f33fbda9179bf 100644
--- a/lib_dec/updt_dec.c
+++ b/lib_dec/updt_dec.c
@@ -641,6 +641,8 @@ void updt_dec_common(
         st->last_bits_frame_nominal = st->bits_frame_nominal;
     }
 
+    st->last_low_rate_mode = st->low_rate_mode;
+
     /*-----------------------------------------------------------------*
      * Increase the counter of initialization frames
      * Limit the max number of init. frames