"image.png" attachment name is fixed. multiple attachment not work.

[dltpdn]

The attachment name is fixed as "image.png".
when paste twice or more, add the attachment as the same name.
as a result every attachments have duplicated names.
only 1 image can be attach within a cell.
and when I convert to PDF or preview, only last the attachment image in the file is shown.

I think that attachment name should include a number and should increase the number every paste action.

Thanks.