Yes, I agree very unexpected. I had problems with PL not making all the measure numbers look alike and in the exact same place. After some searching as to why I stumbled on this. Different fonts was why. I didn't even consider it as I assumed all fonts would change the same but they don't. I went back and looked at several previous scores all new compositions and indeed the same thing happened.
As an addendum, the Show on Multimeasure rests doesn't change either.