Ubuntu wrong systray icon

Bildschirmfoto_2023-02-20_09-23-16

on Xubuntu 22.10 the systray icon is the same as the dropboc icon. (left: dropbox, right nextcloud)
everything works, even the update overlays, but its still the wrong icon. tried to change to monochrome in settings, but it doesnt change anything.

There was another problem with the icon on Linux, but the topic was closed without solving it. However it was on gnome (Xubuntu is using KDE??):

Best is to create a bug report by giving a bit more details on your environment:

Xubuntu is XFCE based
and the other topic describes a different scenario