Instagram briefly replaces vertical feed with horizontal scrolling for many users, says it was meant to be a small test that “went broader than we anticipated”
The Growth of Gestures in the Mobile UX NBC Bay Area : Instagram Users Share Outrage After Brief Update Rolls Out Dave / Notes from Silicon Valley : Instagram accidentally updates app Tweets: Adam Mosseri / @mosseri : @alexeheath Sorry about that, this was supposed to be a very small test but we went broader than we anticipated. @instagram : Due to a bug, some users saw a change to the way their feed appears today. We quickly fixed the issue and feed is back to normal. We apologize for any confusion. Alex Heath / @alexeheath : I have the new Instagram horizontal scroll interface. I'm sure this will not be met with any backlash WHATSOEVER. But seems maybe intended to reduce mindless vertical scrolling? cc @mosseri comments at the end http://twitter.com/... Your Man Zanem / @db : What if - just follow me here - what if this wasn't a small field test and the intent was to gauge large reaction & prime the base for the possibility of change. Because ultimately that's what it did. http://twitter.com/... Josh Constine / @joshconstine : There's a conspiracy theory that Instagram purposefully rolled out tap-to-advance, got spooked by backlash, and made up the “bug”. Highly unlikely. It wouldn't make such a huge change with no blog post/press to soften the blow http://techcrunch.com/... Matthew Lynley / @mattlynley : This is a true statement, but there's also not a whole lot of trust built up that Facebook et al are reporting truthful metrics on what formats actually/are most engaging. With TV/traditional there is at least a large history of evidence to at least infer what is/isn't working. Josh Constine / @joshconstine : @kerrymflynn @TaylorLorenz I feel like tap-to-advance is worse for ads. You skip with a quick tap instead of a longer scroll. If Instagram makes Stories style ads less skippable, then it'd be a cash cow change. http://techcrunch.com/... Julia Reinstein / @juliareinstein : To clarify, as @katienotopoulos said: Instagram beta-tests new features all the time, but the bug here was that it accidentally rolled out to everyone. @TechCrunch reported back in October that Instagram was testing out this kind of scrolling. John Sheehan / @johnsheehan : I think they're trying to slowly move toward making the story format the primary style of post. If everything swipes/moves in the same direction that will be a lot easier. FB clearly wants out of the feed format. http://twitter.com/... Maya Kosoff / @mekosoff : rolling out a terrible new instagram update over the week between christmas and new years is purely evil Katie Notopoulos / @katienotopoulos : Non-chronological feed on Instagram is the best thing that happened to it. The “sparkle” button on Twitter that shows chronological feed is a great reminder that chron-feed is awful. Fight me, fuckers Shira Ovide / @shiraovide : So did we just find out why the Instagram founders quit? Jim Waterson / @jimwaterson : Everyone's complaining they've replaced Instagram's timeline with a tappy thing, but really this is YOUR fault for not spending enough Quality Engagement Time on the main Facebook app and threatening the company's advertising revenue. James Cook / @jamesliamcook : Thought I'd escaped the new horizontal scroll Instagram feed, but I am not that lucky. End of days. pic.twitter.com/ynBepn37ni Myke Hurley / @imyke : This really wrecks a lot of usual interactions. Maybe this is the first post-Systrom move. And it's a bad one. http://twitter.com/... Nate Higgins / @natehiggins : I'm not even joking this new Instagram UI discriminates against left handed people. I can't easily use it with my dominate hand without covering up the entire screen to reach my thumb across meaning I have to do a back and forth constantly to keep browsing. Who approved this?! http://twitter.com/... Casey Newton / @caseynewton : OK everyone it was just a bug, we can all go back to vacation now http://twitter.com/... Owen Williams / @ow : There's going to be a book written one day about how Instagram growth hacked itself to death http://twitter.com/...
Context & Ripple Effects
The horizontal-scroll leak lands weeks after Instagram's tests of redesigned profile layouts that de-emphasized follower counts — part of a late-2018 run of interface experiments touching core surfaces rather than peripheral features. What makes this one different is that it escaped the lab: head of product Adam Mosseri conceded the test "went broader than we anticipated," and the company framed the rollout as a bug after users revolted.
Seen against later coverage, the accident reads as a preview. By early 2021 Instagram confirms work on a TikTok-like "Vertical Stories" feed prototype, and by 2022 it is testing user-selectable Home, Favorites, and chronological feeds — evidence that the swipe-driven feed format behind this botched test kept advancing even after the public rejection.
First-order effects
- Many users were abruptly switched to horizontal scrolling without opt-in, generating immediate outrage that forced Instagram to revert the feed and issue same-day apologies from both @mosseri and the @instagram account.
Second-order effects
- The backlash did not kill the idea internally: parent Facebook separately plans to test a full-screen immersive video player replacing the newsfeed in select international markets, indicating the swipe-first format is being pursued across the family despite user resistance.
Third-order effects
- If the pattern holds, major social platforms will keep shipping gesture-driven, full-screen feed formats through staged tests regardless of vocal pushback — with user protest functioning as one data point in the experiment pipeline rather than a veto, as the later Vertical Stories prototype suggests.
The trend: Consumer social apps are converging on TikTok-style full-screen, gesture-based feeds through incremental tests, treating episodic user backlash as friction to manage rather than a stop signal.