diff --git a/openair2/LAYER2/NR_MAC_UE/config_ue.c b/openair2/LAYER2/NR_MAC_UE/config_ue.c
index da26cae863..d4515ac235 100644
--- a/openair2/LAYER2/NR_MAC_UE/config_ue.c
+++ b/openair2/LAYER2/NR_MAC_UE/config_ue.c
@@ -707,7 +707,10 @@ void nr_rrc_mac_config_req_sib1(module_id_t module_id,
   mac->si_SchedulingInfo = si_SchedulingInfo;
   mac->nr_band = *scc->downlinkConfigCommon.frequencyInfoDL.frequencyBandList.list.array[0]->freqBandIndicatorNR;
   config_common_ue_sa(mac, scc, module_id, cc_idP);
-  configure_current_BWP(mac, scc, NULL);
+  // configure BWP only if it is a SIB1 detection in non connected state (after sync)
+  // not if it is a periodical update of SIB1 (no change of BWP in that case)
+  if(mac->state < UE_CONNECTED)
+    configure_current_BWP(mac, scc, NULL);
 
   // Setup the SSB to Rach Occasionsif (cell_group_config->spCellConfig) { mapping according to the config
   build_ssb_to_ro_map(mac);
diff --git a/openair2/RRC/NR_UE/rrc_UE.c b/openair2/RRC/NR_UE/rrc_UE.c
index 844e75e085..48700e564c 100644
--- a/openair2/RRC/NR_UE/rrc_UE.c
+++ b/openair2/RRC/NR_UE/rrc_UE.c
@@ -431,55 +431,55 @@ bool check_si_validity(NR_UE_RRC_SI_INFO *SI_info, int si_type)
 {
   switch (si_type) {
     case NR_SIB_TypeInfo__type_sibType2:
-      if (!SI_info->sib2)
+      if (!SI_info->sib2 || SI_info->sib2_timer == -1)
         return false;
       break;
     case NR_SIB_TypeInfo__type_sibType3:
-      if (!SI_info->sib3)
+      if (!SI_info->sib3 || SI_info->sib3_timer == -1)
         return false;
       break;
     case NR_SIB_TypeInfo__type_sibType4:
-      if (!SI_info->sib4)
+      if (!SI_info->sib4 || SI_info->sib4_timer == -1)
         return false;
       break;
     case NR_SIB_TypeInfo__type_sibType5:
-      if (!SI_info->sib5)
+      if (!SI_info->sib5 || SI_info->sib5_timer == -1)
         return false;
       break;
     case NR_SIB_TypeInfo__type_sibType6:
-      if (!SI_info->sib6)
+      if (!SI_info->sib6 || SI_info->sib6_timer == -1)
         return false;
       break;
     case NR_SIB_TypeInfo__type_sibType7:
-      if (!SI_info->sib7)
+      if (!SI_info->sib7 || SI_info->sib7_timer == -1)
         return false;
       break;
     case NR_SIB_TypeInfo__type_sibType8:
-      if (!SI_info->sib8)
+      if (!SI_info->sib8 || SI_info->sib8_timer == -1)
         return false;
       break;
     case NR_SIB_TypeInfo__type_sibType9:
-      if (!SI_info->sib9)
+      if (!SI_info->sib9 || SI_info->sib9_timer == -1)
         return false;
       break;
     case NR_SIB_TypeInfo__type_sibType10_v1610:
-      if (!SI_info->sib10)
+      if (!SI_info->sib10 || SI_info->sib10_timer == -1)
         return false;
       break;
     case NR_SIB_TypeInfo__type_sibType11_v1610:
-      if (!SI_info->sib11)
+      if (!SI_info->sib11 || SI_info->sib11_timer == -1)
         return false;
       break;
     case NR_SIB_TypeInfo__type_sibType12_v1610:
-      if (!SI_info->sib12)
+      if (!SI_info->sib12 || SI_info->sib12_timer == -1)
         return false;
       break;
     case NR_SIB_TypeInfo__type_sibType13_v1610:
-      if (!SI_info->sib13)
+      if (!SI_info->sib13 || SI_info->sib13_timer == -1)
         return false;
       break;
     case NR_SIB_TypeInfo__type_sibType14_v1610:
-      if (!SI_info->sib14)
+      if (!SI_info->sib14 || SI_info->sib14_timer == -1)
         return false;
       break;
     default :
@@ -491,7 +491,8 @@ bool check_si_validity(NR_UE_RRC_SI_INFO *SI_info, int si_type)
 int check_si_status(NR_UE_RRC_SI_INFO *SI_info)
 {
   // schedule reception of SIB1 if RRC doesn't have it
-  if (!SI_info->sib1)
+  // or if the timer expired
+  if (!SI_info->sib1 || SI_info->sib1_timer == -1)
     return 1;
   else {
     if (SI_info->sib1->si_SchedulingInfo) {
@@ -771,8 +772,9 @@ static int8_t nr_rrc_ue_decode_NR_BCCH_DL_SCH_Message(module_id_t module_id,
   if (bcch_message->message.present == NR_BCCH_DL_SCH_MessageType_PR_c1) {
     switch (bcch_message->message.choice.c1->present) {
       case NR_BCCH_DL_SCH_MessageType__c1_PR_systemInformationBlockType1:
-        if(SI_info->sib1 != NULL)
-          SEQUENCE_free(&asn_DEF_NR_SIB1, (void *)SI_info->sib1, 1);
+        LOG_D(NR_RRC, "[UE %"PRIu8"] Decoding SIB1\n", module_id);
+        if(SI_info->sib1)
+          ASN_STRUCT_FREE(asn_DEF_NR_SIB1, SI_info->sib1);
         NR_SIB1_t *sib1 = bcch_message->message.choice.c1->choice.systemInformationBlockType1;
         SI_info->sib1 = sib1;
         if(g_log->log_component[NR_RRC].level >= OAILOG_DEBUG)
diff --git a/openair2/RRC/NR_UE/rrc_timers_and_constants.c b/openair2/RRC/NR_UE/rrc_timers_and_constants.c
index b027eb3241..c628b0219b 100644
--- a/openair2/RRC/NR_UE/rrc_timers_and_constants.c
+++ b/openair2/RRC/NR_UE/rrc_timers_and_constants.c
@@ -25,117 +25,76 @@ void nr_rrc_SI_timers(NR_UE_RRC_SI_INFO *SInfo)
 {
   // delete any stored version of a SIB after 3 hours
   // from the moment it was successfully confirmed as valid
-  if (SInfo->sib1) {
+  if (SInfo->sib1 && SInfo->sib1_timer >= 0) {
     SInfo->sib1_timer += 10;
-    if (SInfo->sib1_timer > 10800000) {
-      SInfo->sib1_timer = 0;
-      SEQUENCE_free(&asn_DEF_NR_SIB1, SInfo->sib1, 1);
-      SInfo->sib1 = NULL;
-    }
+    if (SInfo->sib1_timer > 10800000)
+      SInfo->sib1_timer = -1;
   }
-  if (SInfo->sib2) {
+  if (SInfo->sib2 && SInfo->sib2_timer >= 0) {
     SInfo->sib2_timer += 10;
-    if (SInfo->sib2_timer > 10800000) {
-      SInfo->sib2_timer = 0;
-      SEQUENCE_free(&asn_DEF_NR_SIB2, SInfo->sib2, 1);
-      SInfo->sib2 = NULL;
-    }
+    if (SInfo->sib2_timer > 10800000)
+      SInfo->sib2_timer = -1;
   }
-  if (SInfo->sib3) {
+  if (SInfo->sib3 && SInfo->sib3_timer >= 0) {
     SInfo->sib3_timer += 10;
-    if (SInfo->sib3_timer > 10800000) {
-      SInfo->sib3_timer = 0;
-      SEQUENCE_free(&asn_DEF_NR_SIB3, SInfo->sib3, 1);
-      SInfo->sib3 = NULL;
-    }
+    if (SInfo->sib3_timer > 10800000)
+      SInfo->sib3_timer = -1;
   }
-  if (SInfo->sib4) {
+  if (SInfo->sib4 && SInfo->sib4_timer >= 0) {
     SInfo->sib4_timer += 10;
-    if (SInfo->sib4_timer > 10800000) {
-      SInfo->sib4_timer = 0;
-      SEQUENCE_free(&asn_DEF_NR_SIB4, SInfo->sib4, 1);
-      SInfo->sib4 = NULL;
-    }
+    if (SInfo->sib4_timer > 10800000)
+      SInfo->sib4_timer = -1;
   }
-  if (SInfo->sib5) {
+  if (SInfo->sib5 && SInfo->sib5_timer >= 0) {
     SInfo->sib5_timer += 10;
-    if (SInfo->sib5_timer > 10800000) {
-      SInfo->sib5_timer = 0;
-      SEQUENCE_free(&asn_DEF_NR_SIB5, SInfo->sib5, 1);
-      SInfo->sib5 = NULL;
-    }
+    if (SInfo->sib5_timer > 10800000)
+      SInfo->sib5_timer = -1;
   }
-  if (SInfo->sib6) {
+  if (SInfo->sib6 && SInfo->sib6_timer >= 0) {
     SInfo->sib6_timer += 10;
-    if (SInfo->sib6_timer > 10800000) {
-      SInfo->sib6_timer = 0;
-      SEQUENCE_free(&asn_DEF_NR_SIB6, SInfo->sib6, 1);
-      SInfo->sib6 = NULL;
-    }
+    if (SInfo->sib6_timer > 10800000)
+      SInfo->sib6_timer = -1;
   }
-  if (SInfo->sib7) {
+  if (SInfo->sib7 && SInfo->sib7_timer >= 0) {
     SInfo->sib7_timer += 10;
-    if (SInfo->sib7_timer > 10800000) {
-      SInfo->sib7_timer = 0;
-      SEQUENCE_free(&asn_DEF_NR_SIB7, SInfo->sib7, 1);
-      SInfo->sib7 = NULL;
-    }
+    if (SInfo->sib7_timer > 10800000)
+      SInfo->sib7_timer = -1;
   }
-  if (SInfo->sib8) {
+  if (SInfo->sib8 && SInfo->sib8_timer >= 0) {
     SInfo->sib8_timer += 10;
-    if (SInfo->sib8_timer > 10800000) {
-      SInfo->sib8_timer = 0;
-      SEQUENCE_free(&asn_DEF_NR_SIB8, SInfo->sib8, 1);
-      SInfo->sib8 = NULL;
-    }
+    if (SInfo->sib8_timer > 10800000)
+      SInfo->sib8_timer = -1;
   }
-  if (SInfo->sib9) {
+  if (SInfo->sib9 && SInfo->sib9_timer >= 0) {
     SInfo->sib9_timer += 10;
-    if (SInfo->sib9_timer > 10800000) {
-      SInfo->sib9_timer = 0;
-      SEQUENCE_free(&asn_DEF_NR_SIB9, SInfo->sib9, 1);
-      SInfo->sib9 = NULL;
-    }
+    if (SInfo->sib9_timer > 10800000)
+      SInfo->sib9_timer = -1;
+
   }
-  if (SInfo->sib10) {
+  if (SInfo->sib10 && SInfo->sib10_timer >= 0) {
     SInfo->sib10_timer += 10;
-    if (SInfo->sib10_timer > 10800000) {
-      SInfo->sib10_timer = 0;
-      SEQUENCE_free(&asn_DEF_NR_SIB10_r16, SInfo->sib10, 1);
-      SInfo->sib10 = NULL;
-    }
+    if (SInfo->sib10_timer > 10800000)
+      SInfo->sib10_timer = -1;
   }
-  if (SInfo->sib11) {
+  if (SInfo->sib11 && SInfo->sib11_timer >= 0) {
     SInfo->sib11_timer += 10;
-    if (SInfo->sib11_timer > 10800000) {
-      SInfo->sib11_timer = 0;
-      SEQUENCE_free(&asn_DEF_NR_SIB11_r16, SInfo->sib11, 1);
-      SInfo->sib11 = NULL;
-    }
+    if (SInfo->sib11_timer > 10800000)
+      SInfo->sib11_timer = -1;
   }
-  if (SInfo->sib12) {
+  if (SInfo->sib12 && SInfo->sib12_timer >= 0) {
     SInfo->sib12_timer += 10;
-    if (SInfo->sib12_timer > 10800000) {
-      SInfo->sib12_timer = 0;
-      SEQUENCE_free(&asn_DEF_NR_SIB12_r16, SInfo->sib12, 1);
-      SInfo->sib12 = NULL;
-    }
+    if (SInfo->sib12_timer > 10800000)
+      SInfo->sib12_timer = -1;
   }
-  if (SInfo->sib13) {
+  if (SInfo->sib13 && SInfo->sib13_timer >= 0) {
     SInfo->sib13_timer += 10;
-    if (SInfo->sib13_timer > 10800000) {
-      SInfo->sib13_timer = 0;
-      SEQUENCE_free(&asn_DEF_NR_SIB13_r16, SInfo->sib13, 1);
-      SInfo->sib13 = NULL;
-    }
+    if (SInfo->sib13_timer > 10800000)
+      SInfo->sib13_timer = -1;
   }
-  if (SInfo->sib14) {
+  if (SInfo->sib14 && SInfo->sib14_timer >= 0) {
     SInfo->sib14_timer += 10;
-    if (SInfo->sib14_timer > 10800000) {
-      SInfo->sib14_timer = 0;
-      SEQUENCE_free(&asn_DEF_NR_SIB14_r16, SInfo->sib14, 1);
-      SInfo->sib14 = NULL;
-    }
+    if (SInfo->sib14_timer > 10800000)
+      SInfo->sib14_timer = -1;
   }
 }