Everyone knows Disney's The Little Mermaid. It's a favourite of many (although I've never seen it; I have heard said that the themes are a bit on-the-nose in the modern day and age). However, what escapes the notice of many was the poster art and VHS cover art for the film, which were drawn in great haste, apparently. (Contrary to popular rumour, he was in pretty good stead with Disney.) As it turned out, one of the erections on the palace in both the poster and the cover was unusually phallic.
Image from QuoraNow, this originally escaped the purview of many a cinephile until someone complained about it. Then it hit talkback radio. Eventually they did remove the spire in question from future rereleases, as keeping it in after being brought to their attention would be a major cock-up.
(Yes, that is the joke. An informative one, but a joke nonetheless.)