It’s me!… A BUG

When developer missed something, I was born.
When developer fixed something, I was born.
When reviewer neglected something, I was born.
And when functionality does nothing, I was born.

I was born with so many types…
At times I am critical, at times I am time-pass.
I was in disguise and could not be caught,
Until a tester finds me and I was just draught.

Though I was the same but now got a status and a name,
I am lying at developer’s task queue,
I know I will either die or grow.
But if I live, I make everyone sway.