I’m using Libreoffice Version 126.96.36.199 (x64). While working on one of my Writer documents I inadvertently undocked the sidebar, and I can’t re-dock it, so it is always floating. I have tried dragging it to the side with no effect. If I click on its Settings there is an option to dock, but it doesn’t do anything.
If I open any other document the sidebar is correctly docked. I can undock it, but I can’t then re-dock it.