Edit Stomp
This is a wiki trope for wikis (like TV Tropes, but not All The Tropes) that put up a "lock" on edits for a brief period, so one person can make an edit to an article while another editor is trying to "get at" the article. If two people take the article open for editing at the same moment, or override the other's lock inadvertently, there is a chance that one editor's changes may be lost, except in the page history. (This won't happen accidentally at All The Tropes, because MediaWiki detects when this happens and will open a side-by-side comparison editor to allow you to reconcile the two versions.)
In the worst case, this can make an editor look like they are suffering from Wiki Schizophrenia and are arguing against... nobody. It can also make it seem like they are ignoring feedback, if history is examined. It is not to be taken as any more evidence of insanity or rudeness than you would automatically afford any other troper.
No examples, please; we'd be here all week.