Companion App internal URL with BSSID

Hello,
I’m trying to connect Companion App with BSSID.
I have added BSSID:XX:XX:XX:XX:XX:XX in the SSIDs of internal URL in Companion App Server Settings.
I’m sure the MAC Address is correct (This is the one I have in sensor.iphone_bssid).
But this does not work !
(This works If I add the SSID but not if I left the BSSID alone).
Does someone succeeds to connect the Companion App with internal URL via BSSID ?
Thanks.