Created attachment 179876 [details] Screenshot From Harald's recent livestream.
This is a bit odd. Here's the code for that heading: https://invent.kde.org/plasma/polkit-kde-agent-1/-/blob/master/qml/QuickAuthDialog.qml?ref_type=heads#L155-161 It's set up to wrap properly. It looks like what might be happening is that the password field is too long for the window, causing the layout to extend beyond it, so the header never does think it should wrap. Did you see this on your own system, or is it a screenshot from the livestream?
From Harald and Aleix's live stream.
I am using a hacked up prototype of a system modal dialog. Guess I broke something wrt wrapping. Nothing to see here, move along.