Pressing the Windows key (super? meta? I don't quite know which it is in KDE) in combination with any button that does not produce an existing shortcut, such as Win+I, causes Konsole to send the input ^X@s followed by the key you pressed (ie. ^X@s for Win+I). With the default Bash shell, ^X is a hotkey for certain extended functionality, and ^X-@ happens to map to "possible hostname completions", so any accidental Windows-key press in Konsole will cause Bash to automatically print a bunch of hostnames. Please add a way to disable Windows-key combinations from sending the ^X@s input in Konsole.
I should add that ^X@s means: Ctrl+X, followed by a literal @, followed by a literal s.
This is related to bug 96282; technically konsole treats Qt::Key_Meta (which is mapped to the Windows key) as another modifier key.
I think this commit should be reverted: https://cgit.kde.org/konsole.git/commit/?id=5ba344714b8da55dfcc84823abac6f059a288386 And instead we can work with any emacs user who wants these escape sequences to work in emacs and come up with a .keytab that achieves that goal.
On my systems, pressing Win Key opens the plasma menu. So that is annoying. In Konsole if Meta is used for URL hints, those still work (and plasma menu still popups up).
Here's a good link for comment #3 https://invent.kde.org/utilities/konsole/-/commit/5ba344714b8da55dfcc84823abac6f059a288386