problem with using RTL text that contains number

[mghayour]

hi thank you for your awesome project i test it for some big design and it worked correctly except on some text

when we combine RTL text (persian used here) with some numeric parts, numbers dosent show correctly (see below example)

test Svg :

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg xmlns="http://www.w3.org/2000/svg" xml:space="preserve" width="500px" height="150px" version="1.1" style="shape-rendering:geometricPrecision; text-rendering:geometricPrecision; image-rendering:optimizeQuality; fill-rule:evenodd; clip-rule:evenodd"
viewBox="0 0 500 150"
 xmlns:xlink="http://www.w3.org/1999/xlink">
 <defs>
  <style type="text/css">
   <![CDATA[
    .fil1 {fill:#ff0000}
    .fnt0 {font-weight:normal;font-size:65px;font-family:'Arial'}
   ]]>
  </style>
 </defs>
  <text x="480" y="100" class="fil1 fnt0" style="direction:rtl;" text-anchor="strat">1 ساعت و 30 دقیقه</text>
</svg>

svg2png result (notice to "30" and "1")

excepted result (shot taken when open this svg in chrome)

thank you