Distributed sort on DateField, BoolField and BCD{Int,Long,Str}Field returns string cast exception

After upgrading to 4.7, sorting on a date field returns the folllow trace:

<?xml version="1.0" encoding="UTF-8"?>
<response>
<lst name="responseHeader"><int name="status">500</int><int name="QTime">7</int></lst><lst name="error"><str name="msg">java.lang.String cannot be cast to org.apache.lucene.util.BytesRef</str><str name="trace">java.lang.ClassCastException: java.lang.String cannot be cast to org.apache.lucene.util.BytesRef
at org.apache.lucene.search.FieldComparator$TermOrdValComparator.compareValues(FieldComparator.java:940)
at org.apache.solr.handler.component.ShardFieldSortedHitQueue$2.compare(ShardDoc.java:245)
at org.apache.solr.handler.component.ShardFieldSortedHitQueue$2.compare(ShardDoc.java:237)
at org.apache.solr.handler.component.ShardFieldSortedHitQueue.lessThan(ShardDoc.java:162)
at org.apache.solr.handler.component.ShardFieldSortedHitQueue.lessThan(ShardDoc.java:104)
at org.apache.lucene.util.PriorityQueue.insertWithOverflow(PriorityQueue.java:159)
at org.apache.solr.handler.component.QueryComponent.mergeIds(QueryComponent.java:909)
at org.apache.solr.handler.component.QueryComponent.handleRegularResponses(QueryComponent.java:661)
at org.apache.solr.handler.component.QueryComponent.handleResponses(QueryComponent.java:640)
at org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:321)
at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:135)
at org.apache.solr.core.SolrCore.execute(SolrCore.java:1916)
at org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:780)
at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:427)
at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:217)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1419)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:455)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:557)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1075)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:384)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1009)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:255)
at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:154)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
at org.eclipse.jetty.server.Server.handle(Server.java:368)
at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:489)
at org.eclipse.jetty.server.BlockingHttpConnection.handleRequest(BlockingHttpConnection.java:53)
at org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:942)
at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:1004)
at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:640)
at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235)
at org.eclipse.jetty.server.BlockingHttpConnection.handle(BlockingHttpConnection.java:72)
at org.eclipse.jetty.server.bio.SocketConnector$ConnectorEndPoint.run(SocketConnector.java:264)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)
at java.lang.Thread.run(Thread.java:662)
</str><int name="code">500</int></lst>
</response>

The date field is specified as:

<fieldType name="date" class="solr.DateField" sortMissingLast="true" omitNorms="true"/>

And it's used as a dynamic field:

<dynamicField name="date_*" type="date" indexed="true" stored="true" />

Nothing in this configuration has changed since 4.6.1.

Sorting on other values, like integers and text, works fine. Only date fields are a problem.