Sasha - I was wondering about exercise, possibly drinks etc raising the BG at the 4 hour mark as opposed to the meal. But if its slow for him fair enough.
The spud I had was loaded with butter and cheese and it still hit hard & fast.
But of course there are a lot of variables, including the variety of potato which can make a difference. I also wonder about the beans which I didn't have on that occasion.
I know beans hit fast as well, from experience but that will be because of the sauce mostly having a lot of fast carbs in it. When it comes to processing the beans themselves, I suppose that could have a delayed action. I wonder if that might explain the difference.
So there could potentially be a double spike from that mix of foods, with a peak at an hour and a late peak. This would particularly be the case if in large amounts.
And of course the individual's metabolism etc
And there may be a significant difference between T1 and T2 with the added complication of the bolus. I do wonder sometimes if any delay in the BG release can cause a liver dump from a reaction to a low, while the bolus is at its peak, or tailing off. That would give the potential for a further rise when the bolus is running out and if that coincided with a late BG release from some foods then it could cause problems
Sigh....so many variables.