There have been rare instances where the system has glitched resulting in specific resorts getting overbooked - the GC debacle being one example. It wouldn’t be tied to walkers per se - just the system letting more folks ‘book’ certain categories than there are villas for them to stay in. When that happens they do shut it down to sort it out. I’m wondering for those who did get booked which resorts/villa sizes did you get? For those still getting dwarves which resorts are you trying for?
That said, on 1/4 when I ran into Olaf trying to log in & then 7 dwarves once in & trying to book, there were tech issues. Today the 11 month window opened for Sat. 12/10 - so I wonder if a lot of folks have kids whose Christmas school vacations start that week & the demand swamped the system.
On 12/29 adding guests resulted in dwarves for me, so I skipped adding guests & just left myself as lead guest which worked.