Layout Bug in Safari ios9 and IE11

[stewah-WittGruppe]

When you open the example in the documentation with IE11 then you see that you got layout problems.

The points not centered on the line. And the third is not visible.
In Safari ios9 is the third visible but there are all points not centered.
Idea to fix that points are not centered on the line.
You have to set transform: translateY(-50%) to the progressBar
And for step top: 2px; and transform: translate(-50%, 50%);
He moves the third point with the style attribute left: 100%
complete to the right side and then with transform move it with 50% back.
So IE do not show this point. Other browser can work with this.
Idea to fix that is to use negative margin.