Analysis not correctly shown when using also HTMLStripCharFilterFactory

When analyzing a field with only HTMLStripCharFilterFactory and StandardTokenizerFactory, the analysis page doesn't show output for StandardTokenizerFactory even if json response seems to be correct.

To reproduce:
This is the schema:
<?xml version="1.0" ?>
<schema name="${solr.core.name}" version="1.5">
<types>
<fieldType name="long" class="solr.TrieLongField" precisionStep="0" positionIncrementGap="0"/>
<fieldType name="testhtml" class="solr.TextField">
<analyzer>
<charFilter class="solr.HTMLStripCharFilterFactory"/>
<tokenizer class="solr.StandardTokenizerFactory"/>
</analyzer>
</fieldType>
<fieldType name="test" class="solr.TextField">
<analyzer>
<tokenizer class="solr.StandardTokenizerFactory"/>
</analyzer>
</fieldType>
</types>
<fields>
<field name="version" type="long" indexed="true" stored="true"/>
<field name="id" type="long" indexed="true" stored="true" multiValued="false" />
<field name="test" type="test" indexed="true" stored="true" multiValued="false" />
<field name="testhtml" type="testhtml" indexed="true" stored="true" multiValued="false" />
</fields>
<!-- field to use to determine and enforce document uniqueness. -->
<uniqueKey>id</uniqueKey>
<!-- field for the QueryParser to use when an explicit fieldname is absent -->
<defaultSearchField>test</defaultSearchField>
</schema>

Go to analysis page, choose "testhtml" field and insert "a b" in Field Value (Index).

The output shown for HTMLSCF is correct ("a b"), but nothing is shown in the output of ST.

If you choose "test" field, with only ST, it works as expected.

The json, inspected with firebug, seems correct, I think it is only a graphical issue.