Kontact message viewer doesn't use font aliasing under wayland

I had to re-install Kde Neon 6.2 after a failed update, and now kontact doesn’t use font aliasing in the message viewer under wayland (menus and other stuff do). If I use X11, font aliasing is used.
So, what’s the problem here, and how can I solve it? I already looked up the settings in systemsettings, and as I said, it works under X11…