OS: Windows 10, latest updates

When Steam windows are on the main screen (using the Windows taskbar) they have several context menu options, from launching specific windows to recently played games. When I move these windows to a secondary monitor with a DF taskbar, all these options disappear. See the screenshots for illustration.
On a related note: when the "Friends" window is opened and pinned to the DF taskbar and then closed, it cannot be re-opened through there anymore. It seems to pin some sort of generic "steam webhelper" process which doesn't open the Friends window.

All of these issues started at the same time a few weeks ago (about 3 weeks I'm guessing), before that all these things were working correctly.