What happens:
I place a bookshelf near an enchantment table and particle effects do not start right away. they start in about 15 seconds.
How to recreate this:
:info: All partial effects required.
Put down a enchanting table. then put down a books shelf like you would for an enchanting table, with 1 air block in the middle.you will see no particles for a short amount of time.
Cannot reproduce. Maybe your game is lagging.