Instagram comments have disappeared and the feed has reverted to showing the most recent posts in an unusual bug.
Posts appeared as if nobody had commented on them and the "home" part of the app showed all new posts in chronological order.
The bug quickly reverted, though it is not clear whether it is an indication of changes that are coming to the platform.
Previously, Instagram has mistakenly switched on features that were only intended to be tested internally.
In December, for instance, the app introduced an unusual change that meant posts scrolled sideways, rather than up and down. That prompted outcry from users, before Instagram said it had been turned on by mistake.
"Sorry about that, this was supposed to be a very small test but we went broader than we anticipated," Instagram boss Adam Mosseri said at the time.
Numerous Twitter users noticed the unusual change, despite it only appearing on the main version of the app for a very short period.
Instagram did not immediately respond to a request from comment.
