That is OWE Transition mode. OWE is part of WPA3 and for clients that don't support OWE there is a backup SSID and one OWE SSID broadcasted. For more details, you could check this presentation, more specific slide 18&19.
Can you please share with me in a personal message the support case number where TAC suggested that it 'may go away'?
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Herman Robers
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If you have urgent issues, always contact your Aruba partner, distributor, or Aruba TAC Support. Check
https://www.arubanetworks.com/support-services/contact-support/ for how to contact Aruba TAC. Any opinions expressed here are solely my own and not necessarily that of Hewlett Packard Enterprise or Aruba Networks.
In case your problem is solved, please invest the time to post a follow-up with the information on how you solved it. Others can benefit from that.
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