A number of phabricator tickets have been vandalised by the user Vvjjkkii (now disabled) during the last 24 hours. There is no option to undo these changes. For example, please take a look at the ticket https://phabricator.wikimedia.org/T195219 and the changes that happened overnight https://phabricator.wikimedia.org/transactions/detail/PHID-XACT-TASK-zohnmpdgjbql4yy/
Is there any way this problem can be resolved?