Text stops half way thriugh

On some long lessons I find that the text (or the lesson) stops half way through even though there is far more text (and audio) left in the lesson.
On the current one the text stops after 15 minutes but the audio is 30 minutes long.

is it a bug or is there some setting i need to change?

Long texts are split automatically into parts. As you can see for that particular lesson there is (1) at the end of lesson title which suggest it’s part one. If you just move to next lesson in the same course, it will be part (2) of the same text.

great, thanks