Cascadia family version

2106.17

Cascadia family variant(s)

Cascadia Code (the version with ligatures), Cascadia Mono (the version without ligatures)

Font file format(s)

.ttf (variable), .ttf (static), .otf (static)

Platform

macOS 10.14.6

Other Software

No response

What happened?

U+FBC0 ARABIC SYMBOL SMALL TAH ABOVE and U+FBBC ARABIC SYMBOL DOUBLE VERTICAL BAR BELOW are spacing symbols, not combining marks, but in Cascadia Code, they combine with the previous Arabic glyph. For example, here is <U+0628, U+FBC0, U+0628, U+FBBC>:

Here is the same string in Noto Sans Arabic to clarify the correct rendering: