iTunes 12.1.1.4 grows Other between syncs Is this supposed to happen?

I've been using iTunes for years and this latest version 12.1.1.4 seems to grow the Other space exponential between syncs (from 1.45 G to 45.,6!) I have searched for a solution and none other than restoring the system seems to work. (had to do it twice in the past 24 hours! :-() I understand what Other is supposed to contain. None of my apps seems to be using an inordinate amount of space. Is there a problem with this version? Or is something else going on? This is really unacceptable! Thx for any help you can provide.