diff --git a/libraries/BLE/src/BLEClient.cpp b/libraries/BLE/src/BLEClient.cpp
index 436813f859d..862e1a4414c 100644
--- a/libraries/BLE/src/BLEClient.cpp
+++ b/libraries/BLE/src/BLEClient.cpp
@@ -221,6 +221,7 @@ void BLEClient::gattClientEventHandler(
 		// uint16_t          app_id
 		//
 		case ESP_GATTC_REG_EVT: {
+			if (evtParam->reg.app_id != m_appId) break;  // Ignore registrations for other clients/apps.
 			m_gattc_if = gattc_if;
 			m_semaphoreRegEvt.give();
 			break;