I know that there are various reasons for rep dropping suddenly.
What I am asking is, can the reason be recorded permanently in your reputation change history, even if - for example - an upvote was reversed. If people are trying to improve and track reputation to see what things work and what things get a negative response, losing points without knowing why isn't helpful.
If you downvote something, that negative change to your rep gets recorded - can withdrawn / reversed / otherwise cancelled changes also be recorded, please? I would just like to understand what happened when it does happen.
This was triggered by me suddenly losing 15 pts - I assume an accepted answer of mine was withdrawn or possibly reversed - but for what question?