[Bug 51162] New: Xfce systray icons have a background of a next icon

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=51162

Bug ID: 51162
           Summary: Xfce systray icons have a background of a next icon
           Product: Wine
           Version: 6.8
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: explorerframe
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 70030
  --> https://bugs.winehq.org/attachment.cgi?id=70030
Xfce4.16 systray bug

Systray icons have a background of a next icon when running Ubisoft Connect,
Steam and Epic Games launchers. Switching the desktop compositor on and off
changes the background between blank and the next icon. The network icon is
from connman-gtk. Version: xfce4-panel 4.16.2. OpenGL: renderer: Radeon RX 580
Series (POLARIS10 DRM 3.41.0 5.13.0-rc2 LLVM 12.0.0) v: 4.6 Mesa 21.2.0-devel
(git-0df249f 2021-05-19 focal-oibaf-ppa)

I inspected source code of the Xfce4 systray plugin and the problem is not
solvable there.