Not the same thing in common usage. Most people use "bug" to refer to unintended behavior. Wikipedia also includes "incorrect behavior" in its definition, but that's extremely broad, since "incorrect" could be used to describe anything from an underperforming call to action on a landing page to creating software in the wrong market (e.g. "My software had a bug: I created a food delivery app when I should have created a social network app").

In fact, it's hard to even call this a flaw in design, because your intentions and hopes for Bitcoin might be very different than those of the Bitcoin developers.