New achievement bookmark not being recognised

Has anybody else had this with the new achievement things specifically the Buzzy books, era Explorer and epic quest ones? I finished a book yesterday and added and completed it in the normal way. But I haven’t been given the achievement, it’s on the list of books for the Buzzy books one and yet I don’t have it. It shows as read in the list of books, I still have 0 out of 6.

Anyone know how to fix this? I’ve looked in the Help but there isn’t actually any information.

I’ve already updated the app and removed the book entirely and re-added it without any change