So to clarify - in our testing, all linkbooks to places in the overworld, no longer work. This was true for any books on bookstands, also books you carry with you. So it doesn't matter if they were set to following/intralinking or not - they appear not to work in the update.
(They retained their names and locations, but clicking on them did nothing)
So there's nothing we can do now to fix them, you'll have to just run them through the linkbook modifyer once we've updated and select the intralinking again, and they will work again.
Linkbooks to other worlds (nether/wasteland/twilight etc.) realms did all appear to work as normal. So that's good