probably also in later versions. Demonstrated on community.liferay.com, and filed as bug there (as I don't have local spam controls for reproduction). See details in the community github issue: https://github.com/liferay/liferay-community-site/issues/235
https://community.liferay.com/forums/-/message_boards/message/113086354 seems like a legit message, but it hides an embedded spam link in it, making it just nicely covered up spam. The answers are legit, thus I'd like to keep them online. But as soon as I mark the root post as spam, the whole thread is inaccessible.