Hello again,
When I generate ttfs with Glyphsapp, Ms Validator will often report composite glyphs have the E112 error “Bounding box is incorrect Glyph index 38, Composite Maximal deviation=2(FU)”
The help file for this error, Font-Validator/NewHelp/E1112.htm at master · HinTak/Font-Validator · GitHub mentions the following:
Bounding box is incorrect
The bounding box value for the indicated glyph does not agree with the bounding box dimensions defined by the control points at the extremes of the glyph contours. For a composite glyph, the calculation is performed after transformation has been applied to each components of the glyph. This problem may be caused by the font creation tool incorrectly using off-curve control points to calculate the bounding box, or by including side-bearing values.
To replicate, check any ttf from Montserrat/fonts/ttf at master · JulietaUla/Montserrat · GitHub using the prebuilt Font Validator .dmgs
I also hope you had a fab winter break!