I’m on Fedora 42 today, Plasma 6.4.5, KDE Frameworks 6.19 and yes, I have all sorts of SMB related problems with copying and moving files and even just connecting to SMB shares, like shares randomly kicking me out while trying to list files. I often get permissions errors too. I wasn’t paying much attention at first as I mostly use an NFS share, but then I saw this post.