Avast update got double icon on System Tray Notifications.
Hi,
It was like that for me after I upgraded to version 21.10, but now it’s not the case anymore.
https://forum.avast.com/index.php?topic=308695.msg1666012#msg1666012
I don’t know if the second icon disappeared with time or if it disappeared with the 21.11 update :-[
I didn’t update to 21.10, jumping in at 21.11 and there were two entries in the list of Apps in the Task Bar Settings. Both were enabled, but there was only one was displayed in my taskbar area.
I also noticed that my Taskbar Settings were ordered by name, yet this second Avast entry was at the bottom of this alphabetic list and was enabled/on (I switched that off). So currently I still have only one avast tray icon displayed.
Yes, as I mentioned here, …except that the new icon was not activated, so there was no avast in the systray.
I’ve activated it when I realized it as you can see on my screen.
This said, there is only one “avast” today, I do not know when the intruder disappeared :-[
Today seem solved, I don’t know what happened , one icon is disapperad so now have only one icon avast. 
Thanks for the feedback,
as for DavidR and me the second icon went away later, which does not explain what really happened. :
In addition for me, it was the wrong icon that should be displayed in the systray, so I had no more avast icon until I reversed.