Last modified: 2014-09-22 19:00:37 UTC
See the 6 hidden comments I placed in https://en.wikipedia.org/w/index.php?title=User:Elitre_(WMF)/SandboxVE&action=edit . Only 2 of them are visible when VEditing, https://en.wikipedia.org/wiki/User:Elitre_(WMF)/SandboxVE?veaction=edit . Reported on fr.wp, see for example that they are missing from sections Personagges and Liens externes in https://fr.wikipedia.org/w/index.php?title=Détective_Conan&veaction=edit .
The reason for this is that we're currently very conservative about which comments we deem to be "safe" to display, because there are some "unsafe" ones, like comments placed between two table rows. We haven't yet refined the logic for this, so right now a lot of comments are erroneously identified as unsafe.