(Note this is not a new bug, happens also with older Maintenance tools)
On my laptop some fonts of Qt Maintenance tool are huge, see screenshots. This makes it look unprofessional and some texts are even clipped. Laptop is Dell XPS 17, Windows 10, 4k screen, running at resolution 1920x1200. If I change the resolution to native 3840x2400 then the font sizes are OK. But all other applications have correct font sizes also in 1920x1200 so this looks to be a bug in the Qt Maintenance tool (or Qt itself, depending how maintenance tool sets the fonts sizes).