Distributed search with index sharding is not working with basic authentication plugin enabled

"authentication":{ 
   "blockUnknown": true, 
   "class":"solr.BasicAuthPlugin",
   "credentials":{"solr":"IV0EHq1OnNrj6gvRCwvFwTrZ1+z1oBbnQdiVC3otuq0= Ndd7LKvVBAaZIF0QAVi1ekCfAJXr1GGfLtRUXhgrF8c="}, 
   "realm":"My Solr users", 
   "forwardCredentials": false 
}}

<shardHandlerFactory name="shardHandlerFactory"
    class="HttpShardHandlerFactory">
    <int name="socketTimeout">${socketTimeout:600000}</int>
    <int name="connTimeout">${connTimeout:60000}</int>
    <str name="shardsWhitelist">localhost:8984,localhost:8985</str>
  </shardHandlerFactory>

❯ curl --user solr:SolrRocks "http://localhost:8984/solr/core1/select?q=*:*&indent=true&shards=localhost:8985/solr/core1,localhost:8984/solr/core1&fl=id,name&wt=xml"
<?xml version="1.0" encoding="UTF-8"?>
<response>

<lst name="responseHeader">
  <int name="status">401</int>
  <int name="QTime">173</int>
  <lst name="params">
    <str name="q">*:*</str>
    <str name="shards">localhost:8985/solr/core1,localhost:8984/solr/core1</str>
    <str name="indent">true</str>
    <str name="fl">id,name</str>
    <str name="wt">xml</str>
  </lst>
</lst>
<lst name="error">
  <lst name="metadata">
    <str name="error-class">org.apache.solr.client.solrj.impl.BaseHttpSolrClient$RemoteSolrException</str>
    <str name="root-error-class">org.apache.solr.client.solrj.impl.BaseHttpSolrClient$RemoteSolrException</str>
  </lst>
  <str name="msg">Error from server at null: Expected mime type application/octet-stream but got text/html. &lt;html&gt;
&lt;head&gt;
&lt;meta http-equiv="Content-Type" content="text/html;charset=utf-8"/&gt;
&lt;title&gt;Error 401 require authentication&lt;/title&gt;
&lt;/head&gt;
&lt;body&gt;&lt;h2&gt;HTTP ERROR 401 require authentication&lt;/h2&gt;
&lt;table&gt;
&lt;tr&gt;&lt;th&gt;URI:&lt;/th&gt;&lt;td&gt;/solr/core1/select&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;th&gt;STATUS:&lt;/th&gt;&lt;td&gt;401&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;th&gt;MESSAGE:&lt;/th&gt;&lt;td&gt;require authentication&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;th&gt;SERVLET:&lt;/th&gt;&lt;td&gt;default&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;

&lt;/body&gt;
&lt;/html&gt;
</str>
  <int name="code">401</int>
</lst>
</response>