On the left is an example master page from Font Info on my main .glyphspackage file. Ascender height is 732 for all masters.
On the right is the Font Info from an .otf generated from the main file. Why is the ascender height blown up (and its zone collapsed)?
EDITED TO ADD: Now I see where that ascender (and descender) number is coming from: the ascender or descender vertical metrics numbers set by custom parameters. But is that correct?
I used the Vertical Metrics Manager script to set the parameters for the whole family.