how did you find this lol
this number is very close to the 32-bit integer limit maybe that's the problem
I'm pretty sure this is an intentional game design
try to span it with a spawn egg (so the rotation will be different)
you should use 15 bookshelves in one block radios of the table
you should try feeding them and/or breading them
and putting a name tag if the ones above don't work