Hi,
I got the example http://github.com/NordicPlayground/nrf52-ble-multi-link-multi-role and the demo is OK.
I also use nRF Connect APP to connect the ble_aggregator, APP could connect it. But the question, I use other APP(such as LightBlue APP) to connect it, the APP couldn't connect to ble_aggregator.
Have you met the question? I use S140 v6.1.
BR
BruseLight