Just want to add that this is still the case on 1.19. Just dug down to bedrock in my survival world at 00, and I have perfectly mirrored bedrock generation in a 5×5 area (2 lines symmetry).
Yes, there we go. So you have to shift click the item from the book, then shift click the output from the table. Well now this isn't a bug, but a suggestion.
Thanks.
Now another question. How do you mark this as solved?
Yeah, just the bug still persists, and that report seems to have gone silent, and the world was loaded in unmodded Java.