diff --git a/subsys/bluetooth/controller/ll_sw/lll_conn.h b/subsys/bluetooth/controller/ll_sw/lll_conn.h
index 7ea0b7874a1..7fb326e5bd6 100644
--- a/subsys/bluetooth/controller/ll_sw/lll_conn.h
+++ b/subsys/bluetooth/controller/ll_sw/lll_conn.h
@@ -46,7 +46,6 @@ struct lll_conn {
 	uint8_t data_chan_count:6;
 	uint8_t data_chan_sel:1;
 	uint8_t role:1;
-	uint8_t initiated:1;
 
 	union {
 		struct {
@@ -57,18 +56,24 @@ struct lll_conn {
 		uint16_t data_chan_id;
 	};
 
+	union {
+		struct {
+			uint8_t initiated:1;
+		} master;
 #if defined(CONFIG_BT_PERIPHERAL)
-	struct {
-		uint8_t  latency_enabled:1;
+		struct {
+			uint8_t  initiated:1;
+			uint8_t  latency_enabled:1;
 
-		uint32_t window_widening_periodic_us;
-		uint32_t window_widening_max_us;
-		uint32_t window_widening_prepare_us;
-		uint32_t window_widening_event_us;
-		uint32_t window_size_prepare_us;
-		uint32_t window_size_event_us;
-	} slave;
+			uint32_t window_widening_periodic_us;
+			uint32_t window_widening_max_us;
+			uint32_t window_widening_prepare_us;
+			uint32_t window_widening_event_us;
+			uint32_t window_size_prepare_us;
+			uint32_t window_size_event_us;
+		} slave;
 #endif /* CONFIG_BT_PERIPHERAL */
+	};
 
 #if defined(CONFIG_BT_CTLR_DATA_LENGTH)
 	uint16_t max_tx_octets;
diff --git a/subsys/bluetooth/controller/ll_sw/nordic/lll/lll_adv.c b/subsys/bluetooth/controller/ll_sw/nordic/lll/lll_adv.c
index ea9358cfa9c..3714238a14e 100644
--- a/subsys/bluetooth/controller/ll_sw/nordic/lll/lll_adv.c
+++ b/subsys/bluetooth/controller/ll_sw/nordic/lll/lll_adv.c
@@ -744,7 +744,7 @@ static int prepare_cb(struct lll_prepare_param *p)
 	/* Check if stopped (on connection establishment race between LLL and
 	 * ULL.
 	 */
-	if (unlikely(lll->conn && lll->conn->initiated)) {
+	if (unlikely(lll->conn && lll->conn->slave.initiated)) {
 		int err;
 
 		err = lll_hfclock_off();
@@ -1364,7 +1364,7 @@ static inline int isr_rx_pdu(struct lll_adv *lll,
 #endif /* CONFIG_BT_CTLR_CONN_RSSI */
 
 		/* Stop further LLL radio events */
-		lll->conn->initiated = 1;
+		lll->conn->slave.initiated = 1;
 
 		rx = ull_pdu_rx_alloc();
 
diff --git a/subsys/bluetooth/controller/ll_sw/nordic/lll/lll_adv_aux.c b/subsys/bluetooth/controller/ll_sw/nordic/lll/lll_adv_aux.c
index db7dd409b4f..408e1c9d80b 100644
--- a/subsys/bluetooth/controller/ll_sw/nordic/lll/lll_adv_aux.c
+++ b/subsys/bluetooth/controller/ll_sw/nordic/lll/lll_adv_aux.c
@@ -685,7 +685,7 @@ static void isr_tx_connect_rsp(void *param)
 
 	if (is_done) {
 		/* Stop further LLL radio events */
-		lll->conn->initiated = 1;
+		lll->conn->slave.initiated = 1;
 	}
 
 	/* Clear radio status and events */
diff --git a/subsys/bluetooth/controller/ll_sw/nordic/lll/lll_scan.c b/subsys/bluetooth/controller/ll_sw/nordic/lll/lll_scan.c
index ff5353afe94..27a7df0815f 100644
--- a/subsys/bluetooth/controller/ll_sw/nordic/lll/lll_scan.c
+++ b/subsys/bluetooth/controller/ll_sw/nordic/lll/lll_scan.c
@@ -138,7 +138,7 @@ static int prepare_cb(struct lll_prepare_param *p)
 	/* Check if stopped (on connection establishment race between LLL and
 	 * ULL.
 	 */
-	if (unlikely(lll->conn && lll->conn->initiated)) {
+	if (unlikely(lll->conn && lll->conn->master.initiated)) {
 		int err;
 
 		err = lll_hfclock_off();
@@ -371,7 +371,7 @@ static void abort_cb(struct lll_prepare_param *prepare_param, void *param)
 		if (0) {
 #if defined(CONFIG_BT_CENTRAL)
 		} else if (IS_ENABLED(CONFIG_BT_CTLR_LOW_LAT) &&
-			   lll->conn && lll->conn->initiated) {
+			   lll->conn && lll->conn->master.initiated) {
 			while (!radio_has_disabled()) {
 				cpu_sleep();
 			}
@@ -930,7 +930,7 @@ static inline int isr_rx_pdu(struct lll_scan *lll, struct pdu_adv *pdu_adv_rx,
 		 */
 
 		/* Stop further LLL radio events */
-		lll->conn->initiated = 1;
+		lll->conn->master.initiated = 1;
 
 		rx = ull_pdu_rx_alloc();
 
diff --git a/subsys/bluetooth/controller/ll_sw/openisa/lll/lll_adv.c b/subsys/bluetooth/controller/ll_sw/openisa/lll/lll_adv.c
index d41d6b038dd..d1c7cf39ff7 100644
--- a/subsys/bluetooth/controller/ll_sw/openisa/lll/lll_adv.c
+++ b/subsys/bluetooth/controller/ll_sw/openisa/lll/lll_adv.c
@@ -330,7 +330,7 @@ static int prepare_cb(struct lll_prepare_param *prepare_param)
 	/* Check if stopped (on connection establishment race between LLL and
 	 * ULL.
 	 */
-	if (lll->conn && lll->conn->initiated) {
+	if (unlikely(lll->conn && lll->conn->master.initiated)) {
 		int err;
 
 		err = lll_clk_off();
@@ -928,7 +928,7 @@ static inline int isr_rx_pdu(struct lll_adv *lll,
 		}
 #endif /* CONFIG_BT_CTLR_CONN_RSSI */
 		/* Stop further LLL radio events */
-		lll->conn->initiated = 1;
+		lll->conn->master.initiated = 1;
 
 		rx = ull_pdu_rx_alloc();
 
diff --git a/subsys/bluetooth/controller/ll_sw/openisa/lll/lll_scan.c b/subsys/bluetooth/controller/ll_sw/openisa/lll/lll_scan.c
index fa6e7f96bdf..6c94b7b0750 100644
--- a/subsys/bluetooth/controller/ll_sw/openisa/lll/lll_scan.c
+++ b/subsys/bluetooth/controller/ll_sw/openisa/lll/lll_scan.c
@@ -132,7 +132,7 @@ static int prepare_cb(struct lll_prepare_param *prepare_param)
 	/* Check if stopped (on connection establishment race between LLL and
 	 * ULL.
 	 */
-	if (lll->conn && lll->conn->initiated) {
+	if (unlikely(lll->conn && lll->conn->master.initiated)) {
 		int err;
 
 		err = lll_clk_off();
@@ -827,7 +827,7 @@ static inline uint32_t isr_rx_pdu(struct lll_scan *lll, uint8_t devmatch_ok,
 		 */
 
 		/* Stop further LLL radio events */
-		lll->conn->initiated = 1;
+		lll->conn->master.initiated = 1;
 
 		rx = ull_pdu_rx_alloc();
 
diff --git a/subsys/bluetooth/controller/ll_sw/ull_adv.c b/subsys/bluetooth/controller/ll_sw/ull_adv.c
index fe07ba3e62b..d68c888c56a 100644
--- a/subsys/bluetooth/controller/ll_sw/ull_adv.c
+++ b/subsys/bluetooth/controller/ll_sw/ull_adv.c
@@ -873,7 +873,7 @@ uint8_t ll_adv_enable(uint8_t enable)
 
 		/* FIXME: BEGIN: Move to ULL? */
 		conn_lll->role = 1;
-		conn_lll->initiated = 0;
+		conn_lll->slave.initiated = 0;
 		conn_lll->data_chan_sel = 0;
 		conn_lll->data_chan_use = 0;
 		conn_lll->event_counter = 0;
diff --git a/subsys/bluetooth/controller/ll_sw/ull_master.c b/subsys/bluetooth/controller/ll_sw/ull_master.c
index 541f8735a18..550ed3d994d 100644
--- a/subsys/bluetooth/controller/ll_sw/ull_master.c
+++ b/subsys/bluetooth/controller/ll_sw/ull_master.c
@@ -221,7 +221,7 @@ uint8_t ll_create_connection(uint16_t scan_interval, uint16_t scan_window,
 	conn_lll->data_chan_sel = 0;
 	conn_lll->data_chan_use = 0;
 	conn_lll->role = 0;
-	conn_lll->initiated = 0;
+	conn_lll->master.initiated = 0;
 	/* FIXME: END: Move to ULL? */
 #if defined(CONFIG_BT_CTLR_CONN_META)
 	memset(&conn_lll->conn_meta, 0, sizeof(conn_lll->conn_meta));
diff --git a/subsys/bluetooth/controller/ll_sw/ull_slave.c b/subsys/bluetooth/controller/ll_sw/ull_slave.c
index 75b9c965262..97d20ee0b66 100644
--- a/subsys/bluetooth/controller/ll_sw/ull_slave.c
+++ b/subsys/bluetooth/controller/ll_sw/ull_slave.c
@@ -130,7 +130,7 @@ void ull_slave_setup(memq_link_t *link, struct node_rx_hdr *rx,
 	lll->interval = sys_le16_to_cpu(pdu_adv->connect_ind.interval);
 	if ((lll->data_chan_count < 2) || (lll->data_chan_hop < 5) ||
 	    (lll->data_chan_hop > 16) || !lll->interval) {
-		lll->initiated = 0U;
+		lll->slave.initiated = 0U;
 
 		/* Mark for buffer for release */
 		rx->type = NODE_RX_TYPE_RELEASE;