Enchantments don't reset in multiplayer

I'm playing in multiplayer on a MCPE 0.12.1 Server.

I've built a enchantment table and placed it accessible for all.

When the Host enchants an Item, he'll get different enchantments offered afterwards.

When I (Client) enchant items, the enchantment doesn't change afterwards. I can reproduce the same enchantment over and over.

I can abuse the bug to get lots of luck I books, but somehow this isn't what i want...

Update by [Mojang] Adrian Östergård
This bug has been reported to our internal bug tracker for further testing and a fix. It is scheduled to be fixed in one of the future updates (no specific date can be provided).
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