Chart Select Data Source - Doesn't show on selection

[Haha88]

Hi Community,

I created a chart to display every week of the year. However on the select data source, it's missing the tick box for last 2 weeks of December and replace them by the ",,,". I was unable to select or un-select these 2 weeks.

They appear on the chart box though.

I'm looking for some help to resolve the issues. I attached the screenshots for illustration.



Many thanks,
Haha