Created attachment 102945 [details] Streched headers in plasma widget settings Maybe this is related to dpi=280 somehow. I've got a 4k diplay, but do not use the scaling feature because it makes 4k useless.
No, this is not related to DPI. Same problem with standard DPI.
Qt bug, I made a patch for it but it's not in yet: https://codereview.qt-project.org/#/c/162599/