When the size of the chord symbol music font is increased from the default, it changes the spacing of diagonal chord inversions, moving the bass note away from the diagonal slash.
This chord is at the default 11pt size for both Chord Symbols Font and Chord Symbols Music Text Font:
And this one is the same chord with both fonts bumped up to 16pt:
The white space on each side of the slash increases disproportionately relative to the increase in font size.
Here they are resized to the same font size and overlaid on each other:
It seems to me that the chord symbol shouldn’t change its spacing as it gets bigger.