Completed a timeworn keystone at +40 and did not get the achievement “Timeworn Keystone Enthusiast” or the title “The Infernal”. The achievement says to “COMPLETE a m+40 with a Timerunner.”
Submitted screenshot showing completion and sent Ticket to GM who responded in < 5 hours (I feel special that was so fast) and is escalating the issue but cannot guarantee a workaround or the eventual granting of the achievement from that m+ run.
He suggested I report the bug.