There is some unusual happening if two instances of QSystemTrayIcon are used to display different information.
Please refer to the attached sample.
In this example, there are two buttons, each button click triggers the message display. Balloon message displays different content depends on which button is selected.

Steps to reproduce:

1. Click button1, click on ballon, shows a dialog with alert type as 1.
2. Click button2, click on ballon, shows a dialog with alert type as 2.
3. Again click button1 and its ballon, you will see the alert type is now 2. whereas ballon is showing alert type as 1.

It is working perfectly on windows 10