Yeah, that's probably a bug.
If this happens often enough to annoy you, you could file this bug with Apple by typing "applefeedback:///" into Safari. It could take some guesswork to figure out what component to file this against.
If this happens often enough to annoy you, you could file this bug with Apple by typing "applefeedback:///" into Safari. It could take some guesswork to figure out what component to file this against.