User blog comment:Rappy 4187/Technical Update: July 20, 2016/@comment-26154973-20160721213248/@comment-11733175-20160722070328

I know the memory limit was tripled as it was causing issues, not sure if that's been made live yet. There's also some issues due to upgrading from PHP 5.6 to 7 which isn't entirely unsurprising.