On a new board install, an example post is added to the database. The post_text field in the phpbb_posts table contains the raw language: it is missing any XML tags which are expected by some textformatter functions that interpret the text as XML using DOMDocument::loadXML().

For example, \s9e\TextFormatter\Utils::removeFormatting throws an error: Start tag expected, '<' not found in Entity, line: 1

When the post is edited and saved (without actually changing any content) the message is stored with <t></t> wrapped around it and the loadXML() function works fine.