I was moderating this community and yesterday all of a sudden not only that community does not appear any more in my subscriptions, but also all the posts and comments I created there are “gone” from my user detail (i.e. they are not returned by the GET /user call), but they are still there and visible from anonymous users and from other accounts. Did I break some rule?
Check your account settings. Flip the view read posts option.
The “show read posts” option is active. The strange thing is that it happens only for that specific community.