Initially, it seemed like the update was meant to prioritise stories, but when you swipe through your feed the interface hides the Stories bar automatically while expanding posts.
'That was supposed to be a very small test that went broad by accident, ' Mosseri tweeted not long after the backlash became apparent.
But everyone can relax.
This is definitely not the first time an Instagram update has led to users having a meltdown.
Instagram caused an outrage among its users yesterday when it accidentally rolled out a new feature that changed how the newsfeed operates.
You might notice the past tense scattered throughout this post, and that's because while I was writing it, Instagram seemingly reverted everyone back to the classic vertical feed.
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Users were unhappy about this new, yet abrupt, introduction of the landscape orientation of their feeds and immediately took to Twitter to air their disappointment.
According to screenshots shared by Instagram users on Twitter, the update is similar to how people view Instagram stories. Back in October, Instagram had been testing the feature in the Explore section.
But the shift ignited an immediate outcry on Twitter, with some critics comparing it to the dating app Tinder, which allows users to swipe left or right to dismiss or accept contacts. "If you're still seeing it you can simply restart your app and you should be good to go". "We apologize for any confusion", a spokesman told TechCrunch.
"We quickly fixed the issue and feed is back to normal". No one is sure if this was because of the negative reaction on the social media platform or if it was a time-limited test that reached more users then it should have.