You need to initiate a provisioning of a Ubiquiti Unifi access point to make active a change to the Alias. This can be done by changing something like the channel used in the 2.4 or 5 Ghz spectrum or modifying radio signal strength.
Restarting the access point is not sufficient.
Until you do this, running info form the BusyBox CLI on the access point reflects the old alias. Similarily, attempting to Add Device using SNMP in LibreNMS will fail too.