User blog comment:DaNASCAT/Technical Update: April 6, 2016/@comment-1251315-20160406203451/@comment-1251315-20160407141019

The issue with null editing only started yesterday. Before that, they were null editing just fine. I tested with a lengthy article (about 250,000 bytes) on another wiki and it went fine, though was slower than usual. Since it seems local to the Narutopedia, I'll ask a sysop to investigate the problem.