Movement Bug

Hello, I wanted to say I found a new bug in minecraft .. the bug is that I was playing as maintaining the S key to backspace and remained, except I play .. although I'm not sure if it's a bug .. the truth is a bit annoying as the bug without touching the key S is as if you were busy many seconds without my clench.
Sorry for the bad English but I am Spanish and use a translator.
Thanks 🙂