This issue still persists.
Can confirm in 1.19 prerelease-1
I wonder if some other structures were changed in placement due to the addition of templates and such.
Can confirm...It's just as specified...You can't generate it in 22w19a, but it works anywhere in 22w18a...
Confirmed in 22w19a
Also Confirmed in 22w24a. I hope this is fixed as I see work on Trader Llamas as of this snapshot.