After initial testing, I am able to reproduce the issue as you mentioned by using your template Excel file and sample app. I found only one of 3 levels is printed when rendering Excel chart legend categories.
We require thorough evaluation of the issue. We have opened the following new ticket(s) in our internal issue tracking system and will deliver their fixes according to the terms mentioned in Free Support Policies.
Issue ID(s): CELLSNET-57836
You can obtain Paid Support Services if you need support on a priority basis, along with the direct access to our Paid Support management team.
This is to inform you that your issue (Ticket ID: “CELLSNET-57836”) has been resolved on priority basis. The fix will be included in our upcoming release (Aspose.Cells v25.3) that we plan to release in this week.
The issues you have found earlier (filed as CELLSNET-57836) have been fixed in this update. This message was posted using Bugs notification tool by leoluo