You’re not alone. I was actually searching previous posts in the forum to see if I could find the fix I used prior to upgrading to 18.10, so this is a known problem. I’ll post a link to the solution that worked for me if\when I find it.
It’s frustrating though, this is one of those things that would seem to be something that could have been fixed by now…
EDIT: This was the post that helped me on 18.04, unfortunately i did nothing for me on 18.10. I ultimately fixed the issue for myself by switching icon themes to Ubuntu-Mono-Dark. I’d suggest trying a different icon theme and if it persists contacting the developer of your app.
EDIT II: I take it back. I just installed and opened Steam and am seeing the icon huge in the tray just like the weather icon before and your insync app.
