https://bugs.winehq.org/show_bug.cgi?id=38409
--- Comment #48 from Josh winehq@iooioio.hadar.uberspace.de --- Just to put things into perspective:
This bug affects multiple distros and desktop environments (see the duplicates, such as https://bugs.winehq.org/show_bug.cgi?id=42515). On elementaryOS with Pantheon, there is no legacy systray support.
Also, as the word "legacy" implies, this is old stuff that will have to be replaced sooner or later anyway. There may be certain workarounds that work for a subset of users for now but this issue is still relevant.