Is it possible for a fight stick to lag?

I swear, mine lags the inputs, or mashes out something random.

Are there problems like this?

I have a Shitty Madcatz, basic stick, but have sanwa buttons and Semitsu... but I swear to god... sometimes I just input simple dp and it mashes out something crazy, or doesn't do anything at all..

I know i know.. look at my inputs... and muscle memory, I have, and I swear something is wrong here.