when some applications issue a popup notification, their icon in the system tray/notification area changes to an info icon (see attached image). clearing the notification does not revert the icon to its' previous state.
FWIW, this behavior is not observed in the 4.14 panels.
Dolphin Oraclechanged title from xfce4-panel: some notificate area icons change with message popup, and don't revert (panel 4.15 pre1) to xfce4-panel: some notification area icons change with message popup, and don't revert (panel 4.15 pre1)
changed title from xfce4-panel: some notificate area icons change with message popup, and don't revert (panel 4.15 pre1) to xfce4-panel: some notification area icons change with message popup, and don't revert (panel 4.15 pre1)
Dolphin Oraclechanged title from xfce4-panel: some notification area icons change with message popup, and don't revert (panel 4.15 pre1) to xfce4-panel: some notification area icons change with message popup, and don't revert (panel 4.15 (4.16pre1))
changed title from xfce4-panel: some notification area icons change with message popup, and don't revert (panel 4.15 pre1) to xfce4-panel: some notification area icons change with message popup, and don't revert (panel 4.15 (4.16pre1))
attached is a screenshot of the same ksnip working with the 4.14 panel. note the info icon is inside the popup message and the system tray icon is not changed.
yes, the only change is the panel update from the 4.14 panel to the 4.16 panel (and the change in systray plugins). the same version of ksnip and apt-notifier work perfectly well with the 4.14 panel systray.
If I update to the rest of the Xfce 4.15/4.16 components, but leave the panel at 4.14, the problem does not occur.
same issue persists with the xubuntu 21.04 daily (December 12, 2020) and ksnip from the configured ubuntu repositories on the daily iso. tray icon is fine until ksnip issues a popup message. this is translated into a notification popup, the tray icon changes to an info icon, and when the notification is cleared, the tray icon does not change back to the original ksnip icon.
Please stop posting that it's still not fixed as long as there isn't any indication that anybody looked for or found a fix. (We usually link commits and issues, so you'll notice once we believe we found a fix.)
Thanks! :)