SVG <animate>'s begin attribute is incorrectly modified

[yunsii]

Describe the bug
SVG 's begin attribute is incorrectly modified when begin value start with previous animate id.

To Reproduce

<!-- loading.svg  -->
<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24">
  <circle cx="12" cy="12" r="0" fill="currentColor">
    <animate id="svgSpinnersPulseMultiple0" fill="freeze" attributeName="r" begin="0;svgSpinnersPulseMultiple2.end"
      calcMode="spline" dur="1.2s" keySplines=".52,.6,.25,.99" values="0;11" />
    <animate fill="freeze" attributeName="opacity" begin="0;svgSpinnersPulseMultiple2.end" calcMode="spline" dur="1.2s"
      keySplines=".52,.6,.25,.99" values="1;0" />
  </circle>
  <circle cx="12" cy="12" r="0" fill="currentColor">
    <animate id="svgSpinnersPulseMultiple1" fill="freeze" attributeName="r" begin="svgSpinnersPulseMultiple0.begin+0.2s"
      calcMode="spline" dur="1.2s" keySplines=".52,.6,.25,.99" values="0;11" />
    <animate fill="freeze" attributeName="opacity" begin="svgSpinnersPulseMultiple0.begin+0.2s" calcMode="spline"
      dur="1.2s" keySplines=".52,.6,.25,.99" values="1;0" />
  </circle>
  <circle cx="12" cy="12" r="0" fill="currentColor">
    <animate id="svgSpinnersPulseMultiple2" fill="freeze" attributeName="r" begin="svgSpinnersPulseMultiple0.begin+0.4s"
      calcMode="spline" dur="1.2s" keySplines=".52,.6,.25,.99" values="0;11" />
    <animate fill="freeze" attributeName="opacity" begin="svgSpinnersPulseMultiple0.begin+0.4s" calcMode="spline"
      dur="1.2s" keySplines=".52,.6,.25,.99" values="1;0" />
  </circle>
</svg>

After run svg loading.svg -o loading.min.svg, output svg:

<!-- loading.min.svg  -->
<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24">
  <circle cx="12" cy="12" r="0" fill="currentColor">
    <animate fill="freeze" attributeName="r" begin="0;svgSpinnersPulseMultiple2.end" calcMode="spline" dur="1.2s"
      keySplines=".52,.6,.25,.99" values="0;11" />
    <animate fill="freeze" attributeName="opacity" begin="0;svgSpinnersPulseMultiple2.end" calcMode="spline" dur="1.2s"
      keySplines=".52,.6,.25,.99" values="1;0" />
  </circle>
  <circle cx="12" cy="12" r="0" fill="currentColor">
    <animate fill="freeze" attributeName="r" begin="svgSpinnersPulseMultiple0.begin+0.2s" calcMode="spline" dur="1.2s"
      keySplines=".52,.6,.25,.99" values="0;11" />
    <animate fill="freeze" attributeName="opacity" begin="svgSpinnersPulseMultiple0.begin+0.2s" calcMode="spline"
      dur="1.2s" keySplines=".52,.6,.25,.99" values="1;0" />
  </circle>
  <circle cx="12" cy="12" r="0" fill="currentColor">
    <animate fill="freeze" attributeName="r" begin="svgSpinnersPulseMultiple0.begin+0.4s" calcMode="spline" dur="1.2s"
      keySplines=".52,.6,.25,.99" values="0;11" />
    <animate fill="freeze" attributeName="opacity" begin="svgSpinnersPulseMultiple0.begin+0.4s" calcMode="spline"
      dur="1.2s" keySplines=".52,.6,.25,.99" values="1;0" />
  </circle>
</svg>

Expected behavior
Origin svg render result: https://icon-sets.iconify.design/svg-spinners/pulse-multiple/
It broken after transformed.

Desktop

• SVGO Version [3.0.2]
• NodeJs Version [16.14.0]
• OS: [Ubuntu 18.04.6 LTS on WSL 2]

Additional context
Similar previous issue: svg-sprite/svg-sprite#526

[KTibow]

Could be I just don't understand the problem but I can't reproduce this issue with default settings The issue seems to have been introduced in 3.0.1 or 3.0.2