don't bother with last destination ID checking during grant processing if in dedicated CC mode [this may turn out to be a dirty hack];

src/p25/packet/ControlSignaling.cpp

@@ -2131,6 +2131,8 @@ bool ControlSignaling::writeRF_TSDU_Grant(uint32_t srcId, uint32_t dstId, uint8_
             return false;
         }
 
+        // only do the last destination ID checking if we're operating in non-dedicated mode (e.g. DVRS)
+        if (!m_p25->m_dedicatedControl) {
             if (m_p25->m_netState != RS_NET_IDLE && dstId == m_p25->m_netLastDstId) {
                 if (!net) {
                     LogWarning(LOG_RF, P25_TSDU_STR ", TSBK_IOSP_GRP_VCH (Group Voice Channel Request) denied, traffic in progress, dstId = %u", dstId);
@@ -2157,6 +2159,7 @@ bool ControlSignaling::writeRF_TSDU_Grant(uint32_t srcId, uint32_t dstId, uint8_
                     return false;
                 }
             }
+        }
 
         if (!m_p25->m_affiliations.isGranted(dstId)) {
             if (!m_p25->m_affiliations.isRFChAvailable()) {