if you find your Buzz rating dropping points, fire them all, or systemagically fire them, then re-hire. This’ll fix the drop in Buzz,

or

sure, there’s others things you can do too! e.g. do the chicken dance, the rain dance, scream at the monitor a few times,
However; yes, it is a glitch with the waiters serve. solution: I recommend fire and rehire method.

I’ve noticed, from time to time, I end up with one mysterious Zynga waiter to choose from on the list. No worries, He’ll work for you too! just be patient with the glitch and enjoy the Cafe World Show!

I hope this helps with any questions on ‘why is my Buzz rating is slowly dropping’.