I feel for you I truly do.
Just from an outside perspectice, and personal experience with sub, it may be one of two things.
The first one (The one Im truly hoping is the cause) Is sub has this quirky little side effect of releasing tons of pent up emotions that we held in for so long during our active addiction. When I first started sub, for months I found myself in tears over the most mundane things, while at other times I was a raving lunatic. My sub doc is an amazing guy, and explained it as a form of post acute withdrawal syndrome without actually experiencing the crucial withdrawal. If it is indeed this, it will pass. :-)
Now heres my second theory... and this is only from my personal experience. After doing great on sub for 1 year, I began abusing it. I dont care what anyone on here says, suboxone as well as any substance can be abused all for different reasons. While I was self dosing with my subs, my sleep patterns were all screwed up, I found myself more irritated than sad. It was obvious what was happening to me, and it continued until I got back on a plan. Is there any chance at all that he is self dosing? Seeing how sub is prescribed a limited number every 30 days, in order to self dose, a sub user (like myself) would need to up the dose one day, but the next day or so decrease the dose greatly to accomodate for the extra tablets one takes in the days before to avoid running out.
Just a thought.
Best of luck,
HS
Sounds like his dosage may need adjusting. They shouldn't be messing with his sleep like that. It also may be depression. Has he considered seeing a psychiatrist as well as his Sub doctor? No harm in getting second opinions.