The -ms radial gradient doesn't works with percents

[tsarapke]

Example: .background-image(radial-gradient(circle closest-corner at 65% center, #f7f7f7 0%, #e8e9eb 100%));

Compiled:

background-image: 8121991; // Here is ms @process_ms
background-image: -webkit-radial-gradient(65% center,circle closest-corner,#f7f7f7 0,#e8e9eb 100%);
background-image: -moz-radial-gradient(65% center,circle closest-corner,#f7f7f7 0,#e8e9eb 100%);
background-image: -o-radial-gradient(65% center,circle closest-corner,#f7f7f7 0,#e8e9eb 100%);
background-image: radial-gradient(circle closest-corner at 65% center,#f7f7f7 0,#e8e9eb 100%);

How I can fix it?