diff --git a/openair2/LAYER2/NR_MAC_COMMON/nr_mac_common.h b/openair2/LAYER2/NR_MAC_COMMON/nr_mac_common.h
index 51bd9aa948..12b444539f 100644
--- a/openair2/LAYER2/NR_MAC_COMMON/nr_mac_common.h
+++ b/openair2/LAYER2/NR_MAC_COMMON/nr_mac_common.h
@@ -114,6 +114,7 @@ int16_t fill_dmrs_mask(const NR_PDSCH_Config_t *pdsch_Config,
                        mappingType_t mappingtype,
                        int length);
 int get_slots_per_frame_from_scs(int scs);
+uint16_t get_ul_bitmap(const frame_structure_t *fs, int slot);
 bool is_ul_slot(const slot_t slot, const frame_structure_t *fs);
 bool is_dl_slot(const slot_t slot, const frame_structure_t *fs);
 bool is_mixed_slot(const slot_t slot, const frame_structure_t *fs);
diff --git a/openair2/LAYER2/NR_MAC_COMMON/nr_mac_common_tdd.c b/openair2/LAYER2/NR_MAC_COMMON/nr_mac_common_tdd.c
index 922a0153d9..1636cbe436 100644
--- a/openair2/LAYER2/NR_MAC_COMMON/nr_mac_common_tdd.c
+++ b/openair2/LAYER2/NR_MAC_COMMON/nr_mac_common_tdd.c
@@ -24,6 +24,15 @@
 #include "common/utils/nr/nr_common.h"
 #include "nfapi/open-nFAPI/nfapi/public_inc/nfapi_nr_interface_scf.h"
 
+uint16_t get_ul_bitmap(const frame_structure_t *fs, int slot)
+{
+  const int slot_period = slot % fs->numb_slots_period;
+  const tdd_bitmap_t *bm = &fs->period_cfg.tdd_slot_bitmap[slot_period];
+  /* For some reason, we only store the number of symbols if it's mixed */
+  const int num_ul_symbols = bm->slot_type == TDD_NR_MIXED_SLOT ? bm->num_ul_symbols : 14;
+  return SL_to_bitmap(14 - num_ul_symbols, num_ul_symbols);
+}
+
 int get_slots_per_frame_from_scs(int scs)
 {
   const int nr_slots_per_frame[5] = {10, 20, 40, 80, 160};
diff --git a/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_RA.c b/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_RA.c
index d23e95f5ae..b3b3b38b60 100644
--- a/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_RA.c
+++ b/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_RA.c
@@ -812,8 +812,12 @@ static void nr_generate_Msg3_retransmission(module_id_t module_idP,
   uint16_t K2 = tda_info.k2 + get_NTN_Koffset(scc);
   const int sched_frame = (frame + (slot + K2) / slots_frame) % MAX_FRAME_NUMBER;
   const int sched_slot = (slot + K2) % slots_frame;
+  uint16_t slot_bitmap = get_ul_bitmap(&nr_mac->frame_structure, sched_slot);
+  uint16_t msg3_mask = SL_to_bitmap(tda_info.startSymbolIndex, tda_info.nrOfSymbols);
 
-  if (!is_dl_slot(slot, &nr_mac->frame_structure) || !is_ul_slot(sched_slot, &nr_mac->frame_structure))
+  if (!is_dl_slot(slot, &nr_mac->frame_structure)
+      || !is_ul_slot(sched_slot, &nr_mac->frame_structure)
+      || !((msg3_mask & slot_bitmap) == msg3_mask))
     return;
 
   NR_beam_alloc_t beam_ul = beam_allocation_procedure(&nr_mac->beam_info, sched_frame, sched_slot, UE->UE_beam_index, slots_frame);
diff --git a/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_ulsch.c b/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_ulsch.c
index 92b9221054..3282c4a483 100644
--- a/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_ulsch.c
+++ b/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_ulsch.c
@@ -46,13 +46,7 @@ int get_num_ul_tda(gNB_MAC_INST *nrmac, int slot, int k2, const NR_tda_info_t **
   /* we assume that this function is mutex-protected from outside */
   NR_SCHED_ENSURE_LOCKED(&nrmac->sched_lock);
 
-  const frame_structure_t *fs = &nrmac->frame_structure;
-  const int slot_period = slot % fs->numb_slots_period;
-  const tdd_bitmap_t *bm = &fs->period_cfg.tdd_slot_bitmap[slot_period];
-  /* For some reason, we only store the number of symbols if it's mixed */
-  const int num_ul_symbols = bm->slot_type == TDD_NR_MIXED_SLOT ? bm->num_ul_symbols : 14;
-  const uint16_t ul_bitmap = SL_to_bitmap(14 - num_ul_symbols, num_ul_symbols);
-
+  const uint16_t ul_bitmap = get_ul_bitmap(&nrmac->frame_structure, slot);
   *first_idx = NULL;
   FOR_EACH_SEQ_ARR(NR_tda_info_t *, tda, &nrmac->ul_tda) {
     DevAssert(tda->valid_tda);
diff --git a/openair2/LAYER2/NR_MAC_gNB/mac_proto.h b/openair2/LAYER2/NR_MAC_gNB/mac_proto.h
index 239c63b18f..efcabbc98a 100644
--- a/openair2/LAYER2/NR_MAC_gNB/mac_proto.h
+++ b/openair2/LAYER2/NR_MAC_gNB/mac_proto.h
@@ -48,7 +48,6 @@ int get_dl_slots_per_period(const frame_structure_t *fs);
 int get_full_ul_slots_per_period(const frame_structure_t *fs);
 int get_full_dl_slots_per_period(const frame_structure_t *fs);
 int get_ul_slot_offset(const frame_structure_t *fs, int idx, bool count_mixed);
-
 void delete_nr_ue_data(NR_UE_info_t *UE, NR_COMMON_channels_t *ccPtr, uid_allocator_t *uia);
 
 void mac_top_init_gNB(ngran_node_t node_type,