Plasma shutdown screen question

[ITA84]

I couldn't find anything about this issue I have around the Web, so I'm asking here at least to see if it's just my setup.
When I bring up the Plasma logout/shutdown screen (usually with Ctrl+Alt+Del), I can cycle between the reboot, shutdown and logout buttons with TAB, but I can't see which one is highlighted. This has been going on for a while (probably since some version of Plasma 5.1) and I've overlooked the issue, but now I want to know if it only happens to me or if it's a bug in my configuration. The shutdown screen isn't very practical for keyboard users to begin with (for mouse users too, I think, since the side buttons are so small), but having to guess which button is on focus can be really annoying at times.

[doktor5000]

I think this is not a bug, but the default theme is not that practical sometimes. Which theme do you use, and can you attach a screenshot here.

[ITA84]

I'm using Breeze default. Attached is a screenshot: the shutdown button is blue because I've set it as the default, but that's not the button in focus, 'Spegni' is

[ITA84]

Just installed the Plasma 5.8 Beta, and with the changed theme I can now tell which option is selected (although it's still a bit hard to see, but not outright invisible as before)