Hi @Staife
Welcome to the eazyBI community!
You are quite right: Age Interval dimension is based on the age days for unresolved issues (from creation date until now), and when filtered by status, it still groups issues by their age days; only then the report includes issues in this status.
To create the interval dimension based on days in current status, you may want to use JavaScript calculated custom field. Check a thread in the community where this solutions is described closer (including the code itself): Days in Current Status Report
Best,
Ilze, support@eazybi.com