unicode - Found an error in font in Ubuntu, where and how should I report it?

I am playing with Braille Unicode characters and I just realised that DejaVuSans Mono and FreeMono (and maybe other fonts too) show character:

⡳ U+2873 BRAILLE PATTERN DOTS-12567

as

⡣ U+2863 BRAILLE PATTERN DOTS-1267

(they both look the same in Character map, or if used in text)

Dot no 5 is missing.

Should I report it somewhere? Where?

run command:

ubuntu-bug ttf-dejavu-core

and follow instructions.