ble_mesh: fix postponing storage deadline indefinitely

components/bt/esp_ble_mesh/mesh_core/settings.c

@@ -846,7 +846,7 @@ int settings_core_commit(void)
 
 static void schedule_store(int flag)
 {
-    s32_t timeout;
+    s32_t timeout, remaining;
 
     bt_mesh_atomic_set_bit(bt_mesh.flags, flag);
 
@@ -861,6 +861,12 @@ static void schedule_store(int flag)
         timeout = K_SECONDS(CONFIG_BLE_MESH_STORE_TIMEOUT);
     }
 
+    remaining = k_delayed_work_remaining_get(&pending_store);
+    if (remaining && remaining < timeout) {
+        BT_DBG("Not rescheduling due to existing earlier deadline");
+        return;
+    }
+
     BT_DBG("Waiting %d seconds", timeout / MSEC_PER_SEC);
 
     if (timeout) {