German discussion window fails to pop up

[wertrop]

During a lesson (German for English), clicking on the "Discussion" button sometimes doesn't result in the window popping up. The time it happens varies, but once it happens, I can't access discussions for the rest of the lesson.

[Artilex]

It happens a lot for me. I usually have to wait for around a minute to get it to open. Try reporting this in support.