While adding a new section to a user talk page:

Right offset consistency error.
Offset: 1
Expected: == Test ==
Actual: == Test ==
Backtrace:
#0 C:\xampp\htdocs\MediaWiki\Git\extensions\Echo\includes\DiscussionParser.php(133): EchoDiscussionParser::getMachineReadableDiff('== Test ==??Tes...', '== Test ==??Tes...')
#1 C:\xampp\htdocs\MediaWiki\Git\extensions\Echo\includes\DiscussionParser.php(16): EchoDiscussionParser::getChangeInterpretationForRevision(Object(Revision))
#2 C:\xampp\htdocs\MediaWiki\Git\extensions\Echo\Hooks.php(196): EchoDiscussionParser::generateEventsForRevision(Object(Revision))
#3 [internal function]: EchoHooks::onArticleSaved(Object(WikiPage), Object(User), '== Test ==??Tes...', '/* Test */ new ...', 0, NULL, NULL, 98, Object(Revision), Object(Status), false)
#4 C:\xampp\htdocs\MediaWiki\Git\core\includes\Hooks.php(253): call_user_func_array('EchoHooks::onAr...', Array)
#5 C:\xampp\htdocs\MediaWiki\Git\core\includes\GlobalFunctions.php(3811): Hooks::run('ArticleSaveComp...', Array)
#6 C:\xampp\htdocs\MediaWiki\Git\core\includes\content\ContentHandler.php(1079): wfRunHooks('ArticleSaveComp...', Array)
#7 C:\xampp\htdocs\MediaWiki\Git\core\includes\WikiPage.php(1898): ContentHandler::runLegacyHooks('ArticleSaveComp...', Array)
#8 [internal function]: WikiPage->doEditContent(Object(WikitextContent), '/* Test */ new ...', 98, false, NULL, 'text/x-wiki')
#9 C:\xampp\htdocs\MediaWiki\Git\core\includes\Article.php(1937): call_user_func_array(Array, Array)
#10 C:\xampp\htdocs\MediaWiki\Git\core\includes\EditPage.php(1608): Article->__call('doEditContent', Array)
#11 C:\xampp\htdocs\MediaWiki\Git\core\includes\EditPage.php(1608): Article->doEditContent(Object(WikitextContent), '/* Test */ new ...', 98, false, NULL, 'text/x-wiki')
#12 C:\xampp\htdocs\MediaWiki\Git\core\includes\EditPage.php(1115): EditPage->internalAttemptSave(Array, false)
#13 C:\xampp\htdocs\MediaWiki\Git\core\includes\EditPage.php(396): EditPage->attemptSave()
#14 C:\xampp\htdocs\MediaWiki\Git\core\includes\actions\EditAction.php(51): EditPage->edit()
#15 C:\xampp\htdocs\MediaWiki\Git\core\includes\actions\EditAction.php(71): EditAction->show()
#16 C:\xampp\htdocs\MediaWiki\Git\core\includes\Wiki.php(429): SubmitAction->show()
#17 C:\xampp\htdocs\MediaWiki\Git\core\includes\Wiki.php(305): MediaWiki->performAction(Object(Article), Object(Title))
#18 C:\xampp\htdocs\MediaWiki\Git\core\includes\Wiki.php(555): MediaWiki->performRequest()
#19 C:\xampp\htdocs\MediaWiki\Git\core\includes\Wiki.php(448): MediaWiki->main()
#20 C:\xampp\htdocs\MediaWiki\Git\core\index.php(59): MediaWiki->run()
#21 {main}