Bug report - sidebar not work after review

A few days ago I noticed that the sidebar isn’t working as espected.
When a lesson is opened, it works fine, you can select the word meaning with arrows keys up/down, and enter. But once you do any review and goes back to lesson, the side bar no longer shows the meanings and the keys stop working.
So I have to close the lesson and reopen it to get things back to normal.

Thanks for reporting the problem. We will look into it.