BLE notify for several characteristics

Question

I seem to be struggling getting several characteristics to notify on my nrf52840 - peripheral device. 
 
 I can get ONE to notify, but when I add more then notifications stop. The reads work perfectly well, but I need several characteristics to actively notify. 
 
 This is my working "pseudo" code: 
 ________________________________ 
 
 BT_GATT_SERVICE_DEFINE (atlas_sensors_srv, 
 BT_GATT_PRIMARY_SERVICE (BT_UUID_ATLAS_SLAVE_SENSORS), 
 BT_GATT_CHARACTERISTIC (BT_UUID_TEMPERATURE_CHRC, BT_GATT_CHRC_READ, 
 BT_GATT_PERM_READ, my_read_temperature_function, NULL , NULL ), 
 BT_GATT_CHARACTERISTIC (BT_UUID_WEIGHT_CHRC, BT_GATT_CHRC_NOTIFY, 
 BT_GATT_PERM_NONE, NULL , NULL , NULL ), 
 BT_GATT_CCC (weight_ccc_cfg_changed, 
 BT_GATT_PERM_READ | BT_GATT_PERM_WRITE), 
 BT_GATT_CHARACTERISTIC (BT_UUID_LOCATION_CHRC, BT_GATT_CHRC_READ, 
 BT_GATT_PERM_READ, my_read_location_function, NULL , NULL ), 
 BT_GATT_CHARACTERISTIC (BT_UUID_BATTERY_CHRC, BT_GATT_CHRC_READ, 
 BT_GATT_PERM_READ, my_read_battery_function, NULL , NULL ) 
 );

// CCCD configuration changed callback 
 void weight_ccc_cfg_changed ( const struct bt_gatt_attr * attr , uint16_t value ) 
 { 
 bool notify_enabled = (value == BT_GATT_CCC_NOTIFY); 
 printk ( "Notifications weight %s 
 " , notify_enabled ? "enabled" : "disabled" ); 
 } 
 void temp_ccc_cfg_changed ( const struct bt_gatt_attr * attr , uint16_t value ) 
 { 
 bool notify_enabled = (value == BT_GATT_CCC_NOTIFY); 
 printk ( "Notifications temperature %s 
 " , notify_enabled ? "enabled" : "disabled" ); 
 }

int err = bt_gatt_notify ( NULL , & atlas_sensors_srv . attrs [ 3 ], & weight_custom , sizeof (weight_custom)); 
 
 int err = bt_gatt_notify ( NULL , & atlas_sensors_srv . attrs [ 2 ], & temperature_custom , sizeof (temperature_custom)); 
 
 ________________________________ 
 (in the example above temperature does not notify, and the bt_gatt_notify for this will of course not work. I know that. But I can read it ( my_read_temperature_function is not shown, but works). When I connect to my device (using nfr Connect) and subscribe - all is well. I get the updates. 
 
 However I activate notify for the temperaure: _________________________________ 
 
 BT_GATT_SERVICE_DEFINE (atlas_sensors_srv, 
 BT_GATT_PRIMARY_SERVICE (BT_UUID_ATLAS_SLAVE_SENSORS), 
 BT_GATT_CHARACTERISTIC (BT_UUID_TEMPERATURE_CHRC, BT_GATT_CHRC_NOTIFY, 
 BT_GATT_PERM_NONE, NULL, NULL, NULL), 
 BT_GATT_CCC(temp_ccc_cfg_changed, 
 BT_GATT_PERM_READ | BT_GATT_PERM_WRITE), 
 BT_GATT_CHARACTERISTIC (BT_UUID_WEIGHT_CHRC, BT_GATT_CHRC_NOTIFY, 
 BT_GATT_PERM_NONE, NULL , NULL , NULL ), 
 BT_GATT_CCC (weight_ccc_cfg_changed, 
 BT_GATT_PERM_READ | BT_GATT_PERM_WRITE), 
 BT_GATT_CHARACTERISTIC (BT_UUID_LOCATION_CHRC, BT_GATT_CHRC_READ, 
 BT_GATT_PERM_READ, my_read_location_function, NULL , NULL ), 
 BT_GATT_CHARACTERISTIC (BT_UUID_BATTERY_CHRC, BT_GATT_CHRC_READ, 
 BT_GATT_PERM_READ, my_read_battery_function, NULL , NULL ) 
 ); _________________________________

The both characteristics show up, and I can subscribe to both. But ONLY the temperature actually updates. 
 Somehow the notifications for the weigh stops when I also add temperature. I only have this problem with a custom service. The problem is with CCCD - but I cannot see what! Do I need to limit it to one notify per custom service? that seems a bit strange. Sorry for the newbie question - but Im getting there! 
 here is my prj.conf __________________________________ 
 
 # BLE 
 CONFIG_BT =y 
 CONFIG_BT_PERIPHERAL =y 
 CONFIG_BT_DEVICE_NAME = "Altlas FR" 
 CONFIG_BT_DEVICE_APPEARANCE =0 __________________________________