https://bugs.winehq.org/show_bug.cgi?id=38409
--- Comment #18 from Alexey Min alexey.min@gmail.com --- (In reply to sl1pkn07 from comment #17)
Tested with Share (https://appdb.winehq.org/appview.php?iVersionId=6699) the icon is empty
Probably some unexpected icon format. Can you try to run it with WINEDEBUG=+systray and look for messages like
trace: assign_tray_icon_data: Saved icon bitmap, %u bytes
above it will info about image format