How to make custom radiobuttons states selected?

Hello E-Learning Heroes,

I've got a trouble when building a slide with radiobuttons. 

Earlier, like a year ago, it was possible to duplicate selected state of the RB and change the color of it, so it was either green or red according to whether the answer was correct or not. 

Since this spring update, when you duplicate selected state, the circle in the middle dissapears, so there is no longer evident, that this particular radiobutton was the one selected by the user after submitting the question.

We tried to add a small circle, but it's impossible to make it look perfectly centered. As you can see in the picture, it's slightly to the left. It seems to be ok in the story file but after export it just isn't anymore:

We also tried adding a second trigger, which changes the "correct/incorrect" state into "selected" and combines the both of them: 

But it's still different from what I need. I would like to have the radiobutton green as well. (or red for the incorrect annswer)

Is there any possibility how to achieve that state? 

Thank you for any suggestions.

Petra