This isn't the first time I see this happening. An answer has a line of comments that is getting long, gets moved to chat to avoid clutter. Sometimes later the chat gets locked and new comments appear related to the old ones, requiring the chat to understand the context. Sometimes they don't.
Does it only happen if rules are broken by participants to such a degree that none of the comments are salvageable? Or does it also happen for other reasons? If yes, what reasons and are any of them unique to RPGSE?
If it does happen for reasons not having to do with un-salvageable breaches of rules, what can be done to prevent or reduce such occurrences, so as to mitigate the problems of lost context and of information related to an answer?