diff --git a/lib/include/srsran/radio/radio_dummy.h b/lib/include/srsran/radio/radio_dummy.h
index e5a9decb6..a723859ba 100644
--- a/lib/include/srsran/radio/radio_dummy.h
+++ b/lib/include/srsran/radio/radio_dummy.h
@@ -107,7 +107,7 @@ private:
     }
   }
 
-  void advance_tx_timestamp(uint64_t ts)
+  void advance_tx_timestamp(uint64_t ts, bool round_sf = false)
   {
     std::lock_guard<std::mutex> lock(tx_mutex);
 
@@ -116,9 +116,15 @@ private:
       return;
     }
 
-    // Calculate transmission gap in samples
+    // Calculate transmission gap
     uint32_t tx_gap = (uint32_t)(ts - tx_timestamp);
 
+    // Round gap to subframe size
+    if (round_sf) {
+      uint64_t sf_sz = (uint64_t)(srate_hz / 1e3);
+      tx_gap         = sf_sz * SRSRAN_CEIL(tx_gap, sf_sz);
+    }
+
     // Skip zeros if there is no gap
     if (tx_gap == 0) {
       return;
@@ -128,7 +134,7 @@ private:
     write_zeros_ring_buffers(tx_ring_buffers, tx_gap);
 
     // Update new transmit timestamp
-    tx_timestamp = ts;
+    tx_timestamp += tx_gap;
   }
 
 public:
@@ -139,6 +145,9 @@ public:
     for (auto& rb : rx_ring_buffers) {
       srsran_ringbuffer_free(&rb);
     }
+    for (auto& rb : tx_ring_buffers) {
+      srsran_ringbuffer_free(&rb);
+    }
     if (temp_buffer) {
       free(temp_buffer);
     }
@@ -208,7 +217,7 @@ public:
 
     // Check if the transmission is in the past
     if (tx_time_n < tx_timestamp) {
-      logger.error("Error transmission in the past");
+      logger.error("Error transmission in the past for %d samples", (int)(tx_timestamp - tx_time_n));
       return false;
     }
 
@@ -231,7 +240,7 @@ public:
   bool rx_now(srsran::rf_buffer_interface& buffer, srsran::rf_timestamp_interface& rxd_time) override
   {
     // Advance Tx buffer
-    advance_tx_timestamp(rx_timestamp + buffer.get_nof_samples());
+    advance_tx_timestamp(rx_timestamp + buffer.get_nof_samples(), true);
 
     // Read samples
     read_ring_buffers(rx_ring_buffers, buffer.to_cf_t(), buffer.get_nof_samples());
diff --git a/srsenb/src/phy/nr/slot_worker.cc b/srsenb/src/phy/nr/slot_worker.cc
index 6ceb3e43e..0dba28c1b 100644
--- a/srsenb/src/phy/nr/slot_worker.cc
+++ b/srsenb/src/phy/nr/slot_worker.cc
@@ -18,7 +18,7 @@
 
 #ifdef DEBUG_WRITE_FILE
 FILE*           f;
-static uint32_t num_slots = 0;
+static uint32_t num_slots     = 0;
 static uint32_t slots_to_dump = 10;
 #endif
 
@@ -284,9 +284,8 @@ bool slot_worker::work_dl()
   // Releases synchronization lock and allow next worker to retrieve scheduling results
   sync.release();
 
-  // Abort if the scheduling failed
+  // Abort DL processing if the scheduling returned an invalid pointer
   if (dl_sched_ptr == nullptr) {
-    logger.error("Error retrieving DL scheduling");
     return false;
   }
 
diff --git a/srsue/src/phy/nr/slot_sync.cc b/srsue/src/phy/nr/slot_sync.cc
index 35fc2cc02..1d96a2cd6 100644
--- a/srsue/src/phy/nr/slot_sync.cc
+++ b/srsue/src/phy/nr/slot_sync.cc
@@ -27,8 +27,12 @@ static int slot_sync_recv_callback(void* ptr, cf_t** buffer, uint32_t nsamples,
   if (ptr == nullptr) {
     return SRSRAN_ERROR_INVALID_INPUTS;
   }
-  slot_sync*          sync = (slot_sync*)ptr;
-  srsran::rf_buffer_t rf_buffer(buffer, nsamples);
+  slot_sync* sync = (slot_sync*)ptr;
+
+  cf_t* buffer_ptr[SRSRAN_MAX_CHANNELS] = {};
+  buffer_ptr[0]                         = buffer[0];
+
+  srsran::rf_buffer_t rf_buffer(buffer_ptr, nsamples);
 
   return sync->recv_callback(rf_buffer, ts);
 }
diff --git a/srsue/src/phy/sync_sa.cc b/srsue/src/phy/sync_sa.cc
index 17f45104a..7869ea112 100644
--- a/srsue/src/phy/sync_sa.cc
+++ b/srsue/src/phy/sync_sa.cc
@@ -19,7 +19,12 @@ sync_sa::sync_sa(srslog::basic_logger& logger_, worker_pool& workers_) :
   logger(logger_), workers(workers_), slot_synchronizer(logger_), searcher(logger_), srsran::thread("SYNC")
 {}
 
-sync_sa::~sync_sa() {}
+sync_sa::~sync_sa()
+{
+  if (rx_buffer != nullptr) {
+    free(rx_buffer);
+  }
+}
 
 bool sync_sa::init(const args_t& args, stack_interface_phy_nr* stack_, srsran::radio_interface_phy* radio_)
 {
diff --git a/test/phy/dummy_gnb_stack.h b/test/phy/dummy_gnb_stack.h
index f31637f6b..304f9a1f6 100644
--- a/test/phy/dummy_gnb_stack.h
+++ b/test/phy/dummy_gnb_stack.h
@@ -513,6 +513,25 @@ public:
       return nullptr;
     }
 
+    // Schedule SSB before UL
+    for (uint32_t ssb_idx = 0; ssb_idx < SRSRAN_SSB_NOF_CANDIDATES; ssb_idx++) {
+      if (phy_cfg.ssb.position_in_burst[ssb_idx]) {
+        srsran_mib_nr_t mib = {};
+        mib.ssb_idx         = ssb_idx;
+        mib.sfn             = slot_cfg.idx / SRSRAN_NSLOTS_PER_FRAME_NR(phy_cfg.carrier.scs);
+        mib.hrf             = (slot_cfg.idx % SRSRAN_NSLOTS_PER_FRAME_NR(phy_cfg.carrier.scs)) >=
+                  SRSRAN_NSLOTS_PER_FRAME_NR(phy_cfg.carrier.scs) / 2;
+
+        mac_interface_phy_nr::ssb_t ssb = {};
+        if (srsran_pbch_msg_nr_mib_pack(&mib, &ssb.pbch_msg) < SRSRAN_SUCCESS) {
+          logger.error("Error Packing MIB in slot %d", slot_cfg.idx);
+          continue;
+        }
+        ssb.pbch_msg.ssb_idx = (uint32_t)ssb_idx;
+        dl_sched.ssb.push_back(ssb);
+      }
+    }
+
     // Check if the UL slot is valid, if not skip UL scheduling
     if (not srsran_duplex_nr_is_ul(&phy_cfg.duplex, phy_cfg.carrier.scs, TTI_TX(slot_cfg.idx))) {
       return &dl_sched;
@@ -537,25 +556,6 @@ public:
       }
     }
 
-    // Schedule SSB
-    for (uint32_t ssb_idx = 0; ssb_idx < SRSRAN_SSB_NOF_CANDIDATES; ssb_idx++) {
-      if (phy_cfg.ssb.position_in_burst[ssb_idx]) {
-        srsran_mib_nr_t mib = {};
-        mib.ssb_idx         = ssb_idx;
-        mib.sfn             = slot_cfg.idx / SRSRAN_NSLOTS_PER_FRAME_NR(phy_cfg.carrier.scs);
-        mib.hrf             = (slot_cfg.idx % SRSRAN_NSLOTS_PER_FRAME_NR(phy_cfg.carrier.scs)) >=
-                  SRSRAN_NSLOTS_PER_FRAME_NR(phy_cfg.carrier.scs) / 2;
-
-        mac_interface_phy_nr::ssb_t ssb = {};
-        if (srsran_pbch_msg_nr_mib_pack(&mib, &ssb.pbch_msg) < SRSRAN_SUCCESS) {
-          logger.error("Error Packing MIB in slot %d", slot_cfg.idx);
-          continue;
-        }
-        ssb.pbch_msg.ssb_idx = (uint32_t)ssb_idx;
-        dl_sched.ssb.push_back(ssb);
-      }
-    }
-
     return &dl_sched;
   }
 
diff --git a/test/phy/dummy_ue_stack.h b/test/phy/dummy_ue_stack.h
index 8dd740dd9..b8afa0765 100644
--- a/test/phy/dummy_ue_stack.h
+++ b/test/phy/dummy_ue_stack.h
@@ -66,6 +66,11 @@ private:
   metrics_t                      metrics        = {};
   srsue::phy_interface_stack_nr& phy;
 
+  // Atributes to flag configuration PHy complete
+  bool                    configuration_complete = false;
+  std::mutex              configuration_complete_mutex;
+  std::condition_variable configuration_complete_cvar;
+
   // Attributes for throttling PHY and avoiding PHY free-running
   bool                    pending_tti = false;
   std::mutex              pending_tti_mutex;
@@ -195,7 +200,21 @@ public:
     metrics.sr_count = 0;
   }
 
-  void set_phy_config_complete(bool status) override {}
+  void set_phy_config_complete(bool status) override
+  {
+    std::unique_lock<std::mutex> lock(configuration_complete_mutex);
+    configuration_complete = true;
+    configuration_complete_cvar.notify_all();
+  }
+
+  void wait_phy_config_complete()
+  {
+    std::unique_lock<std::mutex> lock(configuration_complete_mutex);
+    while (not configuration_complete) {
+      configuration_complete_cvar.wait(lock);
+    }
+    configuration_complete = false;
+  }
 
   bool get_cell_search_finished()
   {
diff --git a/test/phy/test_bench.h b/test/phy/test_bench.h
index 4097a1eae..5b208c558 100644
--- a/test/phy/test_bench.h
+++ b/test/phy/test_bench.h
@@ -128,6 +128,9 @@ public:
       return;
     }
 
+    // Wait for UE to notify stack that the configuration is completed
+    ue_stack.wait_phy_config_complete();
+
     // Make sure PHY log is not set by UE or gNb PHY
     set_handler_enabled(false);
     if (args.phy_lib_log_level == "info") {