I decarb every time .  Never had a problem.   You said that everyone who ate them could feel it. May I ask if they got a good Buzz or just mildly???   May be how your processing your herb.      It all depends on the material your using .  Even from the same plant.   Trim/ trim and small popcorn buds...  1/2 trim 1/2 buds....  depends on what cha have .  as a example.     Edibles last a lot longer for me , sleeping /pain.   Every batch I make, although measured almost the same is a bit different in strength.   Most times are perfect.  Other times ...  way to strong.   I’ve learned to sample each NEW batch in a smaller dose.   I do not like to be Obliviated,  and tend to micro dose a lot as well, with final one right at bedtime.