User blog comment:Rappy 4187/Technical Update: May 20, 2015/@comment-25024589-20150521114945/@comment-5973717-20150523165148

We have the same issue on http://codelyoko.wikia.com

The bug is confirmed on both Windows 8.1 64-bit and Android 4.4.4 in Chrome and Firefox stable channels.

Turning the feature off and on doesn't fix it, and neither does using action=purge.