Why export ttf and get a Highhhh font box

like this

today!after export,i test the font,the font box suddenly get very tall !

It was normal last month 。i didn’t modify any parameters。。

。。

how can i solve it now?

(this screenshot in Adobeillustrator)

There is probably a glyph with a path that is that low. In the mekkablue scripts, you’ll find a script called Test > Report Lowest and Highest Glyphs.

pardon, where is mekkablue scripts ?

i find it, Thank you very much!!!!!