Congratulations, you've found the only opened bug report about clipboard on Sway/wlroots. It's triggered by edge cases (X11 client hanging + fcitx apparently), and most of it has been fixed already.
Are you really trying to convince people that the clipboard is broken on Wayland with this? Maybe you could start by actually trying Wayland.
Come on.
Congratulations, you've found the only opened bug report about clipboard on Sway/wlroots. It's triggered by edge cases (X11 client hanging + fcitx apparently), and most of it has been fixed already.
Are you really trying to convince people that the clipboard is broken on Wayland with this? Maybe you could start by actually trying Wayland.