context-fill, context-stroke not working if set on a group in a marker

Steps to reproduce:

• open Inkscape
• open marker-context-fill-on-group.svg (which uses the 2nd and 3rd last marker options in 1.1.x)

What happened?

• Bounding box larger than stroke, but no marker visible. This is because these markers define fill as fill:context-stroke but this is set on a group, rather than on paths
  • If you apply it to each circle separately, it works.
  • If you change it to fill:green instead, it also works
• Here's a code snippet to make it more clear what is happening

    <marker
       orient="auto"
       refY="0"
       refX="0"
       id="InfiniteLineStart"
       inkscape:stockid="InfiniteLineStart"
       style="overflow:visible"
       inkscape:isstock="true">
      <g
         transform="translate(-13,0)"
         style="fill:context-stroke"
         id="g1391">
        <circle
           cx="3"
           cy="0"
           r="0.8"
           id="circle1385" />
        <circle
           cx="6.5"
           cy="0"
           r="0.8"
           id="circle1387" />
        <circle
           cx="10"
           cy="0"
           r="0.8"
           id="circle1389" />
      </g>
    </marker>

What should have happened?

context-fill should still use the context fill (I think).

Relevant specs: https://www.w3.org/TR/SVG2/painting.html#TermContextElement

Sample attachments: marker-context-fill-on-group.svg

Debug info

Inkscape 1.1 (4674306a, 2021-06-05), Inkscape 1.2-dev (cb5af3f7, 2021-06-28) Linux Mint 20