i'm guessing that the acidification casues the below reaction...
RCONH2 + H+ + H2O ---> RCOOH + NH4
Yes it would if the reaction was done with a concentrated acid in a hot reflux. But
1) the acid is pH 3 which is weak
2) the solutions are cooled
3) don't leave the amide in contact with acid for very long.
Making sure that the amide stays OK.
Happy now?
The basic hydrolysis of the amide? I'd be worried about that too but I'd have to trust the source of my information (Shulgin?). Make sure you monitor the temperature to keep it from rising too high.