Font Management Problems with Chord Symbols in Fretboard Diagrams

In the attached score, the previous version of which I downloaded, I've added chord symbols and some fretboard diagrams. I can't get the sizes of the chord symbols to be uniform. If I Select All, then apply a font size, the chord symbols associated with fretboard diagrams come out bigger than the others.

I have had this problem before numerous times, and though I can't say for sure that it occurred with new scores I created myself, I would certainly think it did since that's mostly what I work with. However, I tried a test in a new score (created from the Jazz lead sheet template)(and also attached), and the fonts behaved perfectly, all changing in sync.

Note also, in the attached score, that clicking in the main tab on the chord symbol associated with a fretboard diagram causes Musescore to jump to the "Lead Sheet" part. So something is specifically fouled up in this score, though I'm pretty sure that the font size problem with chord symbols associated with fretboard diagrams is more general.