Incorrect rendering (feColorMatrix/feBlend/)

[Vladimir Krivosheev]

SVG:

<svg xmlns="http://www.w3.org/2000/svg" width="18" height="14" fill="none">
  <g clip-path="url(#a)" filter="url(#b)">
    <path fill="#fff" fill-opacity=".01" d="M30 5H10v21h20V5Z"/>
  </g>
  <defs>
    <clipPath id="a">
      <path fill="#fff" d="M0 0h18v14H0z"/>
    </clipPath>
    <filter id="b" width="44" height="45" x="-2" y="-3" color-interpolation-filters="sRGB" filterUnits="userSpaceOnUse">
      <feFlood flood-opacity="0" result="BackgroundImageFix"/>
      <feColorMatrix in="SourceAlpha" result="hardAlpha" values="0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 127 0"/>
      <feOffset dy="4"/>
      <feGaussianBlur stdDeviation="6"/>
      <feColorMatrix values="0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.16 0"/>
      <feBlend in2="BackgroundImageFix" result="effect1_dropShadow_5382_56962"/>
      <feBlend in="SourceGraphic" in2="effect1_dropShadow_5382_56962" result="shape"/>
    </filter>
  </defs>
</svg>

JSVG:

Expected/Chrome/Batik: