diff --git a/src/bridge/HostBridge.P25.cpp b/src/bridge/HostBridge.P25.cpp
index 121aeda6..1f21e952 100644
--- a/src/bridge/HostBridge.P25.cpp
+++ b/src/bridge/HostBridge.P25.cpp
@@ -125,12 +125,12 @@ void HostBridge::processP25Network(uint8_t* buffer, uint32_t length)
     lsd.setLSD2(lsd2);
 
     if (control.getLCO() == LCO::GROUP) {
-        if (srcId == 0) {
-            m_network->resetP25();
-            return;
-        }
-
         if ((duid == DUID::TDU) || (duid == DUID::TDULC)) {
+            // ignore TDU/TDULC entirely when local audio detect or
+            //  traffic from UDP is running
+            if (m_audioDetect || m_trafficFromUDP)
+                return;
+
             // ignore TDU's that are grant demands
             if (grantDemand) {
                 m_network->resetP25();
@@ -138,6 +138,11 @@ void HostBridge::processP25Network(uint8_t* buffer, uint32_t length)
             }
         }
 
+        if (srcId == 0) {
+            m_network->resetP25();
+            return;
+        }
+
         // ensure destination ID matches
         if (dstId != m_dstId) {
             m_network->resetP25();
diff --git a/src/bridge/HostBridge.cpp b/src/bridge/HostBridge.cpp
index b969a529..9cc253fc 100644
--- a/src/bridge/HostBridge.cpp
+++ b/src/bridge/HostBridge.cpp
@@ -652,12 +652,34 @@ int HostBridge::run()
                     m_rxStartTime = 0U;
                     m_rxStreamId = 0U;
 
+                    m_srcIdOverride = 0;
+                    m_txStreamId = 0;
+
+                    m_udpSrcId = 0;
+                    m_udpDstId = 0;
+                    m_trafficFromUDP = false;
+                    m_udpFrameCnt = 0U;
+
+                    // ensure PTT is dropped at call end
+                    if (m_rtsPttEnable) {
+                        deassertRtsPtt();
+                    }
+
+                    m_dmrSeqNo = 0U;
+                    m_dmrN = 0U;
+                    m_p25SeqNo = 0U;
+                    m_p25N = 0U;
+                    m_analogN = 0U;
+
                     if (!m_udpRTPContinuousSeq) {
                         m_rtpInitialFrame = false;
                         m_rtpSeqNo = 0U;
                     }
                     m_rtpTimestamp = INVALID_TS;
 
+                    m_p25Crypto->clearMI();
+                    m_p25Crypto->resetKeystream();
+
                     m_network->resetDMR(1U);
                     m_network->resetDMR(2U);