test failure with libxml2 2.11.1

While attempting to build lxml against the recently released libxml2 2.11.1:

[ 253s] Doctest: xpathxslt.txt
[ 253s] ======================================================================
[ 253s] ERROR: test_iterparse_utf16_bom (lxml.tests.test_io.ETreeIOTestCase)
[ 253s] ----------------------------------------------------------------------
[ 253s] Traceback (most recent call last):
[ 253s] File "/usr/lib64/python3.9/unittest/case.py", line 59, in testPartExecutor
[ 253s] yield
[ 253s] File "/usr/lib64/python3.9/unittest/case.py", line 592, in run
[ 253s] self._callTestMethod(testMethod)
[ 253s] File "/usr/lib64/python3.9/unittest/case.py", line 550, in _callTestMethod
[ 253s] method()
[ 253s] File "/home/abuild/rpmbuild/BUILD/lxml-4.9.2/src/lxml/tests/test_io.py", line 322, in test_iterparse_utf16_bom
[ 253s] elements = [el for _, el in self.etree.iterparse(f.name)]
[ 253s] File "/home/abuild/rpmbuild/BUILD/lxml-4.9.2/src/lxml/tests/test_io.py", line 322, in <listcomp>
[ 253s] elements = [el for _, el in self.etree.iterparse(f.name)]
[ 253s] File "src/lxml/iterparse.pxi", line 210, in lxml.etree.iterparse.__next__
[ 253s] raise error
[ 253s] File "src/lxml/iterparse.pxi", line 195, in lxml.etree.iterparse.__next__
[ 253s] done = self._read_more_events(context)
[ 253s] File "src/lxml/nsclasses.pxi", line 230, in lxml.etree.FunctionNamespace
[ 253s] return __FUNCTION_NAMESPACE_REGISTRIES[ns_utf]
[ 253s] File "src/lxml/parser.pxi", line 1379, in lxml.etree._FeedParser.feed
[ 253s] context._handleParseResult(self, pctxt.myDoc, None)
[ 253s] File "src/lxml/parser.pxi", line 609, in lxml.etree._ParserContext._handleParseResult
[ 253s] c_doc = self._handleParseResultDoc(parser, result, filename)
[ 253s] File "src/lxml/parser.pxi", line 618, in lxml.etree._ParserContext._handleParseResultDoc
[ 253s] return _handleParseResult(self, self._c_ctxt, result,
[ 253s] File "src/lxml/parser.pxi", line 728, in lxml.etree._handleParseResult
[ 253s] _raiseParseError(c_ctxt, filename, context._error_log)
[ 253s] File "src/lxml/parser.pxi", line 657, in lxml.etree._raiseParseError
[ 253s] raise error_log._buildParseException(
[ 253s] File "/tmp/tmp4pmacbxe", line 1
[ 253s] lxml.etree.XMLSyntaxError: Document is empty, line 1, column 1

The release notes of libxml2 2.11.1 state a lot of symbols and deprecated functions are now removed, and also some security patches were addressed which may contribute to this issue.

I'm not sure the best way to handle this error. Any advice?