Using Apose.Cells version 19.8.0 and after exporting to and opening in Excel, a sheet with hidden columns and rows, and different columns width, looks fine.
image.png (42.1 KB)
Now if we make a copy of this sheet, we see that the hidden rows remain hidden but hidden columns get unhidden. We also notice that the columns width get reset.
image.png (39.6 KB)
These 2 issues are happening as from Aspose.Cells version 18.11.0 and onward. It works perfectly fine in version 18.10.0
I have attached the exported file. Open it and make a copy of Sheet2.
aspose bug.zip (8.3 KB)