I leveled up to 23 a while back, but I’m still unlocking vocabulary from 22. If I go to the “level” drop down menu and choose level 22 (to check my progress on what’s left), it shows it all 100% complete in all three sections. However, if I start a new lesson, I still get the remaining 22 Vocabulary as expected.
FYI, if I go to level 23 (which I have not started on yet), it shows that I have started all my radicals and some kanji/vocabulary.
If click a non-grayed out (active) Radical/Vocabulary/Kanji (like “leather” in my screen shot), it shows no progress on that character’s page as expected (since I have not actually started that level).
Like I said, lesson still work as usual, but I can’t check what’s left via the “level” drop down menu.