In community.wanikani.com, opening any links to topics with Japanese in the fully qualified URL stopped working when opening them in a new tab or directly copying and pasting the link. Clicking the link to navigate within the same tab still works.
For example, opening this link in a new tab should navigate to
But instead it tries to navigate to
which fails to load.
If the link happens to match exactly, it works fine. But of course with topic renames this is often not the case.
I also tried to reproduce on try.discourse.org, but on that install Japanese characters never get added to the URL even when included in the topic title. I’m not sure why that’s the case, but without that happening I can’t demonstrate the bug there.