在dynamic_rnn中正确使用sequence_length

I am attempting to design an RNN for sequence classification purposes using tensorflow's dynamic_rnn. My examples can vary in length and through my research I learned that I can pass "sequence_length" as a parameter that designates the length of my examples. However, when I attempt to do so I am getting some peculiar results. In short, the inclusion of the variable prevents my system from learning, thankful I am still able to train when I buffer my sequences with 0s out to the maximum length but I would really like to know what is going wrong for my future work.I am attempting to design an RNN for sequence c