Sounds about as good a reason as any, unless the owner asked for it to be deleted, which is unlikely. Maybe they thought they were registering scubatours.ca?
Also note that cubatours was in TBR on Feb 12, 2020 as well (and no one picked it up!)
But my bet is that you'll eventually see it get redirected here by the new owner:
http://authenticubatours.ca, that is unless it was registered by one of you. And if you did, you should contact this owner in Toronto and sell it to them. They own quite a few similar cuba tour domains.