Tray: Child menu items of a parent won't display if there is more than one parent item on Linux Mint

[joshuar]

Checklist

• I have searched the issue tracker for open issues that relate to the same problem, before opening a new one.
• This issue only relates to a single bug. I will open new issues for any other problems.

Describe the bug

I am constructing a tray menu with the following structure:

• Parent Menu Item 1
• Parent Menu Item 2
  • Child Menu Item 1
  • Child Menu Item 2

Two parent items, one which has two child items.

On some Linux distributions, such as Linux Mint, the child menu items do not display. They do display on other distributions like Fedora. I am unsure why the different distribution would change the behaviour of the same code?

How to reproduce

Run the example code:

• Running on Fedora, all menu items are shown correctly.
• Running on Mint, the child menu items do not display.

Screenshots

On Fedora:

On Mint:

Example code

The code:

package main

import (
	"fyne.io/fyne/v2"
	"fyne.io/fyne/v2/app"
	"fyne.io/fyne/v2/cmd/fyne_demo/data"
	"fyne.io/fyne/v2/driver/desktop"
	"fyne.io/fyne/v2/widget"
)

func main() {
	a := app.NewWithID("fyne-test")
	a.SetIcon(data.FyneLogo)

	w := a.NewWindow("SysTray")

	aMenu := fyne.NewMenuItem("Menu 1", nil)
	aMenuWithChild := fyne.NewMenuItem("Menu 2", nil)
	aMenuWithChild.ChildMenu = fyne.NewMenu("",
		fyne.NewMenuItem("Childmenu 1", nil),
		fyne.NewMenuItem("Childmenu 2", nil))
	if desk, ok := a.(desktop.App); ok {
		m := fyne.NewMenu("MyApp",
			aMenu,
			aMenuWithChild,
		)
		desk.SetSystemTrayMenu(m)
	}

	w.SetContent(widget.NewLabel("Fyne System Tray"))
	w.SetCloseIntercept(func() {
		w.Hide()
	})
	a.Run()
}

Fyne version

2.4.5

Go compiler version

go version go1.22.2 linux/amd64

Operating system and version

Fedora 40 and Linux Mint

Additional Information

No response