Status-Tray: No Volume control with Mousewheel

using Manjaro 20.2 XFCE tested with radiotray-ng 0.2.7-1 and clementine 1.4.0rc1 after update to xfce 4.16 I can't adjust playback volume using mouse over the tray icon. Using pavucontrol allows volume changes.

I tried to check DBUS and I found no messages coming from mousewheel (over the tray icon). Only when I press the wheel and do simultaneous scrolling, then I got messages and also volume changes.

mc 1611323352.404519 181 :1.28 :1.44 /org/ayatana/NotificationItem/radiotray_ng org.kde.StatusNotifierItem Scroll

sig 1611323352.406036 225 :1.44 /org/ayatana/NotificationItem/radiotray_ng/Menu com.canonical.dbusmenu ItemsPropertiesUpdated

I hope you can help with this?