Problems with leaking at night

I think it could be a sign that your pouchitis is not as under control as you think, based on my own past history.  Have you been scoped recently?  The only suggestion I would make, beyond effective treatments for pouchitis like antibiotics and biologics, is to try an anti-spasmodic in case the issue is being caused by a spasmodic pouch.  I actually think it's more likely pouchitis, as nighttime leakage was always a sign of slippage for me.

I think you are probably right, but not having any other pouchitus symptoms.  I have never used and anti-spasmodic, can you give some examples?

Levsin (which I prefer, the generic of which is hyoscamine), and bentyl are the two main anti-spasmodics and if you have a spasmodic pouch issue one at bedtime would help. If they do not help then I would think the issue is likely being caused by pouchitis.

I’m with CT on this. The pouchitis is likely not adequately controlled. 

I'm going to agree that you probably have pouchitis.  Leaking at night is my number one signal I have the 'itis.