I think I may have heard something about hydrolysis in presence of H2O2 stops it at the amide stage. Maybe someone can give a reference...
Just a follow up. A peroxide reference from
Katritzky is here. Search "nitrile hydrogen peroxide".
I note that Katritzky also argues that base catalysis of a nitrile ends at a carboxylic acid. This is what I wrote in my book. A nitrile will hydrolyze all the way to a carboxylic acid (unless limited by water) because the amide intermediate is more basic than the nitrile starting material. This encourages its continued reaction over the less reactive or lower concentration of protonated nitrile.
In the case of a base hydrolysis, it is easier to stop at an amide as the conditions for amide hydrolysis requires formation of the dialkoxy anion. Thus, if insufficiently basic or concentrated conditions are used, the reaction can stop at the amide stage. (That had been my experience in the lab as well.) However, your mileage may vary.