Hey,, @instagram … I never want to sideways scroll through my timeline. Ever. Please stop testing this "feature" on my account.
– Scott Neumyer (@ScottNeumyer) December 27, 2018
A number of us at Engadget had the new feed orientation as well, though for some people, the new feature didn't reach all of their accounts. And for at least one of our editors, their feed switched back and forth between the new view and the standard view. It seems this update was another quick test that Instagram has already concluded.
Update, 12/27/18, 11:08 AM ET: This story's headline and copy
Update, 12/27/18, 11:20 AM ET: Adam Mosseri, head of Instagram, tweeted today that the sideways scroll feature was supposed to be a small-scale test, but the company accidentally extended it to more users than it intended to. If you still have the sideways scroll and you want to revert back to the normal view, just restart the app. We've updated this story's headline and copy to reflect this information.
went broad by accident. Should be fixed now. If you're still seeing it simply restart the app. 19
– Adam Mosseri (@mosseri) December 27, 2018