Some users also managed to record how the new interface works.
Mosseri further explained that the app, which has more than 1 billion monthly users, is constantly testing new experiences but that Thursday's change went to "a few orders of magnitude more people than intended".
The popular social media app's unannounced refresh, which Instagram has since labeled as a bug, took users by surprise Thursday. But users who received it found that they needed to horizontally swipe through the posts on their feed, and also discovered that they could "tap" through the posts, much like one would while going through Instagram Stories. The users were made to tap through newsfeed instead of scrolling through it vertically.
"This was supposed to be a very small test but we went broader than we anticipated", he tweeted. When the new timeline appeared, Instagram informed its users via a message that said, "Introducing a new way to move through posts". We quickly fixed the issue and feed is back to normal.
Today, Instagram pushed out a massive update changing how users use the app entirely.
Most people seem to hate it... I'm sure this will not be met with any backlash WHATSOEVER. If you're still seeing the horizontal feed in the app, try restarting it, Mosseri says.
But, it wasn't before angry users took to social media to blast the firm for its decision to flip the feed. Regardless, Adam Mosseri, the head of Instagram posted on Twitter shortly after to apologize and reveal the change was supposed to be a "small test".
It's likely - having put the time into developing this "feature" - that Instagram does intend to make horizontal scrolling an option in future, if not the default interface.