does this mean that the guest ssid does not handle special characters? i
Special characters have been causing random issues for years, be it in SSIDs, device names or passwords. Just don't try anything fancy and stick to alphanumeric.
My special character in SSID is only underscore "_" and it never gave any problems in 382.1_2 .You can reproduce problem in following mode: create (or enable previous created guest network ) a guest network SSID and verify if it is displayed automatically on wifi list of the smartphone,likewise when you remove a guest network verify if it is removed from smartphone sssid list.
This is what I did, and the SSID appeared and disappeared normally for me.
@RMerlin I now that You do very big work for as, but do You thinks to correct problems with dual WAN if second WAN is USB LTE modem?
I don't touch neither Dual WAN or USB modem code.