We all have individual reactions to foods, and need to bear that in mind whenever eating new foods (also meter variance and portion size).
These rolls are not bread in the traditional sense. If you look up the ingredients you will see they are basically wheat protein and soya flour.
From the perspective of a diet controlled T2:
I would try another roll and see if the results repeat.
If so, drop down to a half roll and see if you tolerate that.
Luckily, despite being grain intolerant, i tolerate a whole roll very well.
i am not on insulin, so can't really comment on dosing, except that i have seen many T1s comments where they bolus for protein when they move to a lc diet.