I have a fresh install of Fedora KDE Plasma Desktop 40. Every time I log into the DE, the Discover application opens automatically on start. How can I disable this behavior so that Discover does not automatically launch? There are no apps configured for autostart in the KDE autostart system settings.
I had the same issue, I went to Session settings and disabled session saving. I can't remember the exact names of them but I think that you'll find it.