Some old system fonts or old character rasterization engines had problems with certain diacritics, like breve, and they were moved to the space between or after

Some old system fonts or old character rasterization engines had problems with certain diacritics, like breve, and they were moved to the space between or after characters. Some Wikipedia articles simply mention that > Characters may not combine well on some computers. It was easy to detect people typing or editing text on Apple devices because “their” characters appeared broken, unlike usual single codepoints.