Put me down as another "Safari got it right". I'll Orion+ shortly either way, but, I wish it was mimicking Safari.
I can understand how the jumpy bar seems inconsistant. Relative to the window, sure, it's inconsistant.
I'll submit relative to the tab it's an impressively intuitive design. It wins on that tradeoff.
Sometimes, wisdom is knowing when to not do what you do elsewhere. I think Apple made the right call.