Hi John!
I hope you are well. Please be informed I checked and passed above to the person responsible for such issues.
Thank you for your report!
Best Regards,
Iustitia
@Edit
Just quick update. This is not a bug - it is a known thing and players are unable to use Kinto on -1 levels. If someone will summon a Kinto, after moving 1 SQM it will be automatically disabled. However thank you for informing about "dungeon" message!