Whisker Menu Plugin v. 2.3.1-1 - Custom root icon in the panel replaced icons of its subfolders

On Debian 10.9.0, in the current Whisker Menu Plugin version (v. 2.3.1-1), if the user imports custom menus with icons, and he enables the "Show menu hierarchy" option, the icon of the root voice/folder of the imported menu is correct, but it is replicated also to its subfolders overriding the icons of the subfolders themselves.

I tested it by importing parrot-menu on Debian and on Whisker panel the result is the following:

If we disable the Whisker Menu plugin and we work only with the default XFCE application menu, the icons are shown correctly (as you can see in the following image for the three shown subfolders):

Test Reference: https://github.com/ParrotSec/parrot-menu/issues/13

Thank you in advance