What could be the reason for the strange problem with connecting the font?

Question

css

Need help, friends.
I've been struggling for an hour with connecting the Proxima Nova font. For some reason it only shows up in IE.
I convert with protein, the Cyrillic alphabet is not cut off.

@font-face {
  font-family: 'ProximaNova';
  src: url('../fonts/proxima_nova_light-webfont.eot');
  src: url('../fonts/proxima_nova_light-webfont.eot?#iefix') format('embedded-opentype'),
  url('../fonts/proxima_nova_light-webfont.woff2') format('woff2'),
  url('../fonts/proxima_nova_light-webfont.woff') format('woff'),
  url('../fonts/proxima_nova_light-webfont.ttf') format('truetype'),
  url('../fonts/proxima_nova_light-webfont.svg#proxima_nova_ltlight') format('svg');
  font-weight: 300;
  font-style: normal;
}

Who will tell you what the problem is?

Answer 1

The culprit was found - this is an updated csscomb config, which swapped 2 srcs, and as a result, the last one was always

src: url('../fonts/proxima_nova_bold_italic-webfont.eot');

Answer 2

I wrote detailed instructions here:
How to connect non-standard fonts so that they are drawn in the canvas?
Try like this:

@font-face {
  font-family: "ProximaNova"; // двойные кавычки!!!
  src: url('../fonts/proxima_nova_light-webfont.eot');
  src: url('../fonts/proxima_nova_light-webfont.eot?#iefix') format('embedded-opentype'),
  url('../fonts/proxima_nova_light-webfont.woff2') format('woff2'),
  url('../fonts/proxima_nova_light-webfont.woff') format('woff'),
  url('../fonts/proxima_nova_light-webfont.ttf') format('truetype'),
  url('../fonts/proxima_nova_light-webfont.svg#proxima_nova_ltlight') format('svg');
  font-weight: 300;
  font-style: normal;
}

then when you assign a font to elements you write without quotes:

#d1 {
    font: 300 18px ProximaNova;  // без кавычек
}