Yes, because fibers absorb water.
Drinking fibers before going to bed is absolutely pointless in my opinion, because fibers will cause your intestines to work heavily, what you would not want during the night.
It's better to get something easily ingestible before going to bed like casein with a LITTLE fat, but no fibers.
All the nighttime eating is way overrated, nobody get thin overnight if he doesn't eat slow protein before bed.