You’re welcome.
Fonts are really hard to build. New font designer typically only design the letter shapes and copy/paste them into a font building application. If they make the effort they will kern (or “letterspace”) the characters, so a V shape and an A shape “slide into eachother” a bit, which looks nicer.
The problem is, fonts are in fact really, really tricky to design well, and include tons of information about type hinting on digital screens, on printers, compatibility issues with older font systems, classification, Postscript compatibility issues, binary and ASCII issues, international font classification and copyright/embedding data and flags.
This is where free font designers fall short of their professional counterparts: more often than not, they don’t understand and don’t include this part of the work. Some operating system work around this, assume certain info if it’s missing, or try to fail gracefully. Other operating systems (or versions of them) just kill the font if it’s not up to standard.