User blog comment:Rappy 4187/Technical Update: February 22, 2017/@comment-25239866-20170223121212/@comment-25239866-20170223143021

I think that does not cache properly. I tested it on every browser and the same thing happens. Most of then are disappeared or are in a previous revision and any edit I did to these posts looks like being edited by Undefined. Mar Tsok  14:30, February 23, 2017 (UTC)