thunar-4.17.7: Shortcuts for custom actions in submenus do not work

I have assigned to a custom action with a submenu. The shortcut does not work. However, if I delete the submenu entry from that custom action, the shortcut works as expected. When assigned as a submenu I can observe the following when using the shortcut key:

1. Select the file.
2. Press the assigned shortcut key. => The icon/thumbnail part is no longer selected, but the filename stays selected. Repeatedly pressing the shortcut selects and deselects the icon/thumbnail.