Problem with Reloading SLD file in QGIS

[Miemieku]

I have some svg files that I want to use in QGIS and save as SLD files. I added the path of the SVG file to QGIS (Settings -> Option -> System -> SVG Paths), loaded the SVG file on the layer, and exported the SLD file.

But I found that there is a problem with the exported SLD file, when I reloading this SLD file to other layers in QGIS, it will become a question mark. I think the problem is because of this part :
<se:OnlineResource xlink:type="simple" xlink:href="C:/Users/heji/Desktop/Fachdaten/SLD_Fachdaten/svg/Schulform_Sekundarschule.svg?fill=%23232323&fill-opacity=1&outline=%23232323&outline-opacity=1&outline-width=1"/>

When I change it to <se:OnlineResource xlink:type="simple" xlink:href="C:/Users/heji/Desktop/Fachdaten/SLD_Fachdaten/svg/Schulform_Sekundarschule.svg"/>
, it can displays fine.

Does anyone have the same issue as me?

<?xml version="1.0" encoding="UTF-8"?>
<StyledLayerDescriptor xmlns="http://www.opengis.net/sld" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:se="http://www.opengis.net/se" xmlns:ogc="http://www.opengis.net/ogc" version="1.1.0" xsi:schemaLocation="http://www.opengis.net/sld http://schemas.opengis.net/sld/1.1.0/StyledLayerDescriptor.xsd">
  <NamedLayer>
    <se:Name>Kindergarten Kopie</se:Name>
    <UserStyle>
      <se:Name>Kindergarten Kopie</se:Name>
      <se:FeatureTypeStyle>
        <se:Rule>
          <se:Name>Single symbol</se:Name>
          <se:PointSymbolizer>
            <se:Graphic>
              <!--Parametric SVG-->
              <se:ExternalGraphic>
                <se:OnlineResource xlink:type="simple" xlink:href="C:/Users/heji/Desktop/Fachdaten/SLD_Fachdaten/svg/Schulform_Sekundarschule.svg?fill=%23232323&amp;fill-opacity=1&amp;outline=%23232323&amp;outline-opacity=1&amp;outline-width=1"/>
                <se:Format>image/svg+xml</se:Format>
              </se:ExternalGraphic>
              <!--Plain SVG fallback, no parameters-->
              <se:ExternalGraphic>
                <se:OnlineResource xlink:type="simple" xlink:href="Schulform_Sekundarschule.svg"/>
                <se:Format>image/svg+xml</se:Format>
              </se:ExternalGraphic>
              <!--Well known marker fallback-->
              <se:Mark>
                <se:WellKnownName>square</se:WellKnownName>
                <se:Fill>
                  <se:SvgParameter name="fill">#232323</se:SvgParameter>
                </se:Fill>
                <se:Stroke>
                  <se:SvgParameter name="stroke">#232323</se:SvgParameter>
                  <se:SvgParameter name="stroke-width">1</se:SvgParameter>
                </se:Stroke>
              </se:Mark>
              <se:Size>14</se:Size>
            </se:Graphic>
          </se:PointSymbolizer>
        </se:Rule>
      </se:FeatureTypeStyle>
    </UserStyle>
  </NamedLayer>
</StyledLayerDescriptor>

Versions

QGIS version: 3.16.14-Hannover
Compiled against Qt: 5.15.2