How to reproduce :

• Embed some node in an xmltext field
• Add a section limitation to content/read policy (any section)
• Try to render xmltext field with a user subject to said policy

What happens:

• eZ\Publish\Core\FieldType\XmlText\Converter\EmbedToHtml5::processTag() checks user permissions to read embedded location
• eZ\Publish\Core\Limitation\SectionLimitationType::evaluate() complains that $object should be of type ContentCreateStruct, Content, VersionInfo or ContentInfo

This can be reproduced with several limitation types (section, content type ) probably every content related limitation.