I installed the Anki 2.1.54 Qt6 version on my Linux desktop (running Debian testing); I removed the old Debian anki package first. It all works well, except there are some weird characters appearing; see the line “Changes below will affect the ???tes that …” in this screenshot, for example:

They are consistently present, even if I restart Anki.
Any ideas what might be causing this?
Your system/available fonts appear to lack support for the following unicode characters: U+2068, U+2069
Thanks! That’s solved the problem - I managed to remove the offending font and now the display is fine.