Oh, there are indeed issues and bugs. For what it’s worth, I get a similar bug on Windows where sometimes a window doesn’t change taskbars when I drag it to the next monitor ¯\_(ツ)_/¯

Again, my point was your arguments are illustrating my initial take really well. You’re - rightfully so - criticizing Cinnamon, but describing it as a “Linux” thing. You didn’t mention Windows once, but you also did describe Windows’ multiple taskbar’s behavior as the thing you need. Can we not dismiss everything I say like I’m being a fanboy just for telling you software issues and bugs on one desktop environment are not a “Linux” thing, but a "software on top of Linux " thing? Yes, on Windows, your window manager is part of Windows. On Linux, it isn’t. Hell, some don’t even have panels by default.

FWIW, I’m far from a fanboy. I love macOS, still use and like Windows for other reasons, and am also extremely critical of Linux where it fails to perform. OSes are just tools, means to an end, IMHO. Please, let’s not devolve the conversation to this kind of tribalism. The Linux world can be confusing enough as it is, coming back to my first comment again… Sometimes the “fanboys” are just people who have been bitten by these things for longer than you (I’ve been using some form of Linux for ~16+ years) and wanted to help or explain some common misconception.

If this can help, I think all of KDE Plasma (both the default ones, and Latte), MATE and XFCE lets you duplicate panels.