Test Progression gadget in JIRA dashboard shows unexpected "Unscheduled tests"
I'm having an issue with the gadget Test Progression on JIRA dashboard. Although I haven't added any tests to the cycle, it shows that I have 40 unscheduled tests. In the horizontal axis, it is supposed to show days but it only displays only one column during the past few days (I have configured the gadget to show 3 days).
Could anyone with experience tell me what possibly went wrong?