I'd ask what temperature you mashed at, and also if you know the ratio of the wheat to base malt? If your mash was a touch warm it might have produced more unfermentable sugars, making for a sweeter beer with a higher FG. I'd also ask how you are sure it's stuck? Have you taken the specific gravity with a few days gap to check? I ask, as airlock bubbling isn't always the best way to know. I had an FV bucket that after about the 2nd use started leaking gas like a sieve, so after the initial very active fermentation the airlock would stop dead. I retired it in the end after a brew (one of my last kit brews) developed a pellicle, often a good sign that you have air getting to the beer.
If it's been less than about 2 weeks, you might want to wait a bit longer, then take 2 SG readings a few days apart, then compare, if you haven't done this already. It's perfectly possible your FV is just leaking CO2, so when you rouse it the pressure increases and you get bubbles, then when it calms a bit again the pressure drops so the CO2 just slowly exits the FV by other routes.
Do forgive me if you have already checked the SG. I can only make a guess based on the information presented, no numbers posted suggests you may not have.
Cheers
