I just got B levers on my Ravenna 26 (I also got levers on the Gs, and already had levers on C’s and Fs).
I recommend that you always disengage your levers when you’re not playing the harp.
Tune your B’s to flat, so you’re in F major.
Here’s another question:
I tuned my Bs to Bb today, and noticed that they were fairly sharp when the levers were engaged.
Could be a little bit of both.