Hey, I think I know what's wrong!
This happened to me before.. this is about using bread.. see, I used potato hamburger buns cause I didn't have any crackers and what happened was that the peanut butter melted into the bread! It looked like what happens when you spread butter on your toast and the butter dissappeared and just becomes a mere color on your bread.
That's exactly what happened to the peanut butter, it merely colored the bread brown. All that was left in the bun was the weed.

Now, in your case, since begals are indeed bread- I'll bet anything the peanutbutter melted into the bread.
When this happens, the weed has no place to absorb into!
However, I heard that using tin foil doesn't allow anything to melt.. but lemme ask: did the peanut butter melt into the begal? I didn't use tin foil for mine.
Otherwise:

FIRECRACKERS CANNOT USE BREAD!
theres a reason they're not called firetoast