Of late, I have been featured in some posts that generate many comments on Facebook. Naturally, I like these comments.
So when a new one comes in and old ones I thought I previously liked no longer show them being liked, it was noticeable. Over the past few months, I have seen the behavior over and over.
My primary hunch is that I am just a bad person and did not actually like them as I thought. Human memory is fallible. It is easily feasible that I in seeing them not liked assumed that I would have taken action to like them. The memory of having done so could actually be the recollection of doing so with others conflated to this incident.
Hypothetically, it is possible that I like a post and the action never gets updated in the database without telling me it failed. If the UI is designed to show the like whether or not the database took it, then I could see it liked and when I return later to see it not liked. Maybe because these posts have such a large dataset collected into a single place I more easily notice when this happens. It would be disturbing if we go to all the trouble of responding and others are never getting that feedback.