ChSel Algorithm

I use two PCA10040 for nus experiment, S132, SDK14.1

sniffer capture packets found that no data can be captured after the master send CONNECT_REQ, I guess it is not because my capture tool does not support BLE5.0 LE Channel Selection Algorithm # 2, is it possible for this reason?

If yes, what can I do to switch the board back to LE Channel Selection Algorithm # 1?