Incorrect names displayed in "Items" tab

[JJO]

Description: Ubuntu Bionic Beaver (development branch)
Release: 18.04

In Panel app -> Items tab

Many different items are listed as a separator eg. "Notification area" is listed as "Separator"
When hovering the mouse over them the item name will change to "Clock"

Attached screen shot

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: xfce4-panel 4.12.2-1ubuntu1
ProcVersionSignature: Ubuntu 4.15.0-12.13-generic 4.15.7
Uname: Linux 4.15.0-12-generic x86_64
ApportVersion: 2.20.8-0ubuntu10
Architecture: amd64
CurrentDesktop: XFCE
Date: Thu Mar 22 22:45:31 2018
ExecutablePath: /usr/bin/xfce4-panel
InstallationDate: Installed on 2018-03-22 (0 days ago)
InstallationMedia: Xubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180322)
ProcEnviron:
 LANGUAGE=en_AU:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_AU.UTF-8
 SHELL=/bin/bash
SourcePackage: xfce4-panel
UpgradeStatus: No upgrade log present (probably fresh install)

[JJO (191jordan)]

Created attachment 5494
Panel Items List

The list of items in on the Items tab in the Panel Settings dialogue is inaccurate. Contains duplicate names along side different icons. Eg. "Clock" beside Whisker Menu icon. Also the name will change when hovering with the mouse pointer. Please see attachment image.

[JJO (191jordan)]

The bug was noticed while using Xubuntu 14.04

[Webmercenary (webmercenary)]

I'm experiencing this issue in both Xubuntu 14.04 and 14.10. Here is a video I took during a guest session of 14.10 demonstrating the issue.

http://youtu.be/SiVQWsjD8eM

[Taylor Bush (bush-taylor)]

I'm using XFCE 4.12 and have the same issue with the panel item names being duplicated in the list, and they change when hovering the mouse over them. I am using Arch Linux.

[Taylor Bush (bush-taylor)]

Created attachment 6607
Duplicated Item Names in XFCE 4.12

[JimDean (jdean55)]

I see the same thing on Fedora 26 with Xfce 4.12, xfce4-panel 4.12.1

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Matt (mdsimmo)]

Same problem: brand new installation of xubuntu 18.04. Xfce version 4.12

[Sean Davis (bluesabre)]

Reportedly fixed upstream.