Mart,
I realize no one has replied to your question for three weeks, but your sample match question works just fine for me and moves on to the lesson end or next page, as the case may be. I am using Moodle 2.3.1+ (Build: 20120816).
Have you tried changing the settings in the grade options and flow control section of the lesson settings? I can post a picture of my settings if you need them.
Hope this helps,
AL