I've just downloaded the app on a nexus 5Nexus 5, and I couldn't replicate the problem.
There are three possibilities that I can think of:
Your network connection dropped out before downloading the full question.
- This can be tested by seeing if you get the problem every time or just sometimes on a mobile connection.
It's a device specific-specific bug.
- If this is the case we can't really test for it ourselves, the best you can do to help is provide details of the handset you're using and the androidAndroid OS version and let the developers pick it up.
It's just a one-off isolated bug that you can't reproduce.
- In this case you should just restart the app and carry on. If it appears again try to think of anything that you keep doing before it happens and post it here.
I had another possibility, but I've forgotten what it was.