I am running the portable version (v2.46.1) in WIN 11. I start the Stack Marker (using HotKey Ctrl+Alt+Q) and get the audible feedback click. However, when I start to copy (ctrl-c), I don't hear any audible feedback and the clipboard is not filled.
If I toggle clipboard Monitor off/on, it starts working again.
I often need to toggle off/on when I want to use the stack feature.