The slash on Ⱦ in the Unicode charts has the same orientaion as the slashes on Ⱥ, Ȼ and Ø. But in the DejaVu font the slash on this character has the opposite orientation.
Created attachment 9166 [details] Example of slashed characters in DejaVu fonts. Example of slashed characters in DejaVu fonts.
This has already been fixed. Update to a more recent version. Thanks for reporting.
Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.