diff --git a/src/include/switch_rtp.h b/src/include/switch_rtp.h
index 1fd94ce688..3459f7db2c 100644
--- a/src/include/switch_rtp.h
+++ b/src/include/switch_rtp.h
@@ -351,7 +351,7 @@ SWITCH_DECLARE(switch_status_t) switch_rtp_zerocopy_read(switch_rtp_t *rtp_sessi
 */
 SWITCH_DECLARE(switch_status_t) switch_rtp_zerocopy_read_frame(switch_rtp_t *rtp_session, switch_frame_t *frame, switch_io_flag_t io_flags);
 
-SWITCH_DECLARE(void) rtp_flush_read_buffer(switch_rtp_t *rtp_session);
+SWITCH_DECLARE(void) rtp_flush_read_buffer(switch_rtp_t *rtp_session, switch_rtp_flush_t flush);
 
 /*!
   \brief Enable VAD on an RTP Session
diff --git a/src/include/switch_types.h b/src/include/switch_types.h
index 4a9a11219e..fea61d5ec6 100644
--- a/src/include/switch_types.h
+++ b/src/include/switch_types.h
@@ -110,6 +110,7 @@ SWITCH_BEGIN_EXTERN_C
 #define SWITCH_PATH_SEPARATOR "/"
 #endif
 #define SWITCH_URL_SEPARATOR "://"
+#define SWITCH_BRIDGE_HANGUP_CAUSE_VARIABLE "bridge_hangup_cause"
 #define SWITCH_READ_TERMINATOR_USED_VARIABLE "read_terminator_used"
 #define SWITCH_SEND_SILENCE_WHEN_IDLE_VARIABLE "send_silence_when_idle"
 #define SWITCH_CURRENT_APPLICATION_VARIABLE "current_application"
@@ -443,6 +444,11 @@ typedef struct {
 	switch_rtp_numbers_t outbound;
 } switch_rtp_stats_t;
 
+typedef enum {
+	SWITCH_RTP_FLUSH_ONCE,
+	SWITCH_RTP_FLUSH_STICK,
+	SWITCH_RTP_FLUSH_UNSTICK
+} switch_rtp_flush_t;
 
 #define SWITCH_RTP_CNG_PAYLOAD 13
 
@@ -464,7 +470,7 @@ typedef struct {
 	SWITCH_RTP_FLAG_DATAWAIT	  - Do not return from reads unless there is data even when non blocking
 	SWITCH_RTP_FLAG_BUGGY_2833    - Emulate the bug in cisco equipment to allow interop
 	SWITCH_RTP_FLAG_PASS_RFC2833  - Pass 2833 (ignore it)
-	SWITCH_RTP_FLAG_AUTO_CNG      - Generate outbound CNG frames when idle
+	SWITCH_RTP_FLAG_AUTO_CNG      - Generate outbound CNG frames when idle    
 </pre>
  */
 typedef enum {
@@ -489,7 +495,8 @@ typedef enum {
 	SWITCH_RTP_FLAG_PROXY_MEDIA = (1 << 18),
 	SWITCH_RTP_FLAG_SHUTDOWN = (1 << 19),
 	SWITCH_RTP_FLAG_FLUSH = (1 << 20),
-	SWITCH_RTP_FLAG_AUTOFLUSH = (1 << 21)
+	SWITCH_RTP_FLAG_AUTOFLUSH = (1 << 21),
+	SWITCH_RTP_FLAG_STICKY_FLUSH = (1 << 22)
 } switch_rtp_flag_enum_t;
 typedef uint32_t switch_rtp_flag_t;
 
diff --git a/src/mod/endpoints/mod_sofia/mod_sofia.c b/src/mod/endpoints/mod_sofia/mod_sofia.c
index fc3c817129..c9138b03d5 100644
--- a/src/mod/endpoints/mod_sofia/mod_sofia.c
+++ b/src/mod/endpoints/mod_sofia/mod_sofia.c
@@ -1015,10 +1015,18 @@ static switch_status_t sofia_receive_message(switch_core_session_t *session, swi
 		goto end;
 
 	case SWITCH_MESSAGE_INDICATE_BRIDGE:
+		if (switch_rtp_ready(tech_pvt->rtp_session)) {
+			rtp_flush_read_buffer(tech_pvt->rtp_session, SWITCH_RTP_FLUSH_STICK);
+		}
+		goto end;
 	case SWITCH_MESSAGE_INDICATE_UNBRIDGE:
+		if (switch_rtp_ready(tech_pvt->rtp_session)) {
+			rtp_flush_read_buffer(tech_pvt->rtp_session, SWITCH_RTP_FLUSH_UNSTICK);
+		}
+		goto end;
 	case SWITCH_MESSAGE_INDICATE_AUDIO_SYNC:
 		if (switch_rtp_ready(tech_pvt->rtp_session)) {
-			rtp_flush_read_buffer(tech_pvt->rtp_session);
+			rtp_flush_read_buffer(tech_pvt->rtp_session, SWITCH_RTP_FLUSH_ONCE);
 		}
 		goto end;
 
diff --git a/src/switch_ivr_bridge.c b/src/switch_ivr_bridge.c
index d2a84b1783..2b10b26a80 100644
--- a/src/switch_ivr_bridge.c
+++ b/src/switch_ivr_bridge.c
@@ -829,6 +829,7 @@ SWITCH_DECLARE(switch_status_t) switch_ivr_multi_threaded_bridge(switch_core_ses
 	int br = 0;
 	int inner_bridge = switch_channel_test_flag(caller_channel, CF_INNER_BRIDGE);
 	const char *var;
+	switch_call_cause_t cause;
 
 	switch_channel_set_flag(caller_channel, CF_ORIGINATOR);
 
@@ -961,6 +962,14 @@ SWITCH_DECLARE(switch_status_t) switch_ivr_multi_threaded_bridge(switch_core_ses
 				switch_cond_next();
 			}
 
+			if ((cause = switch_channel_get_cause(caller_channel))) {
+				switch_channel_set_variable(peer_channel, SWITCH_BRIDGE_HANGUP_CAUSE_VARIABLE, switch_channel_cause2str(cause));
+			}
+
+			if ((cause = switch_channel_get_cause(peer_channel))) {
+				switch_channel_set_variable(caller_channel, SWITCH_BRIDGE_HANGUP_CAUSE_VARIABLE, switch_channel_cause2str(cause));
+			}
+
 			switch_core_session_rwunlock(peer_session);
 
 		} else {
diff --git a/src/switch_rtp.c b/src/switch_rtp.c
index 01d77a2cdc..070062ef10 100644
--- a/src/switch_rtp.c
+++ b/src/switch_rtp.c
@@ -1330,10 +1330,20 @@ static void do_2833(switch_rtp_t *rtp_session)
 	}
 }
 
-SWITCH_DECLARE(void) rtp_flush_read_buffer(switch_rtp_t *rtp_session)
+SWITCH_DECLARE(void) rtp_flush_read_buffer(switch_rtp_t *rtp_session, switch_rtp_flush_t flush)
 {
 	if (switch_rtp_ready(rtp_session) && !switch_test_flag(rtp_session, SWITCH_RTP_FLAG_PROXY_MEDIA)) {
 		switch_set_flag_locked(rtp_session, SWITCH_RTP_FLAG_FLUSH);
+		switch (flush) {
+		case SWITCH_RTP_FLUSH_STICK:
+			switch_set_flag_locked(rtp_session, SWITCH_RTP_FLAG_STICKY_FLUSH);
+			break;
+		case SWITCH_RTP_FLUSH_UNSTICK:
+			switch_clear_flag_locked(rtp_session, SWITCH_RTP_FLAG_STICKY_FLUSH);
+			break;
+		default:
+			break;
+		}
 	}
 }
 
@@ -1459,7 +1469,7 @@ static int rtp_common_read(switch_rtp_t *rtp_session, switch_payload_t *payload_
 		int do_cng = 0;
 
 		if (rtp_session->timer.interval) {
-			if (switch_test_flag(rtp_session, SWITCH_RTP_FLAG_AUTOFLUSH)) {
+			if (switch_test_flag(rtp_session, SWITCH_RTP_FLAG_AUTOFLUSH) || switch_test_flag(rtp_session, SWITCH_RTP_FLAG_STICKY_FLUSH)) {
 				if (switch_poll(rtp_session->read_pollfd, 1, &fdr, 1) == SWITCH_STATUS_SUCCESS) {
 					hot_socket = 1;
 				}
@@ -1526,7 +1536,7 @@ static int rtp_common_read(switch_rtp_t *rtp_session, switch_payload_t *payload_
 		}
 		
 		if (bytes && rtp_session->recv_msg.header.m && rtp_session->recv_msg.header.pt != rtp_session->te) {
-			rtp_flush_read_buffer(rtp_session);
+			rtp_flush_read_buffer(rtp_session, SWITCH_RTP_FLUSH_ONCE);
 		}
 
 		if (bytes && switch_test_flag(rtp_session, SWITCH_RTP_FLAG_AUTOADJ) && switch_sockaddr_get_port(rtp_session->from_addr)) {