I am using Moodle 2.9.1 version. I am randomly facing problem with grader report. After finishing an attempt from student account, I could see the grade as pass/fail in the grader report. The moment I clicked on Export, the number of attempts became 0 and then that attempt was no longer visible.
I have face this problem twice. This is testing mode so it's ok but if it happens when my site is live, it will be a major issue.
So please help me to fix this.