Several Instagram users were left in shock after the photo sharing app suddenly changed its interface. Instagram temporarily switched to horizontal scrolling and users just didn’t seem happy. Instagram apologised to users on social media, calling the whole thing a “bug” but users went into full-blown meltdown-mode on Twitter sharing their reactions. And even though the feed was back to normal even before many could even see the update, #instagramupdate trended on Twitter.“Due to a bug, some users saw a change to the way their feed appears today,” Instagram tweeted earlier today. 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.&mdash; Instagram (@instagram) December 27, 2018In case you’re wondering what the horizontal scroll was like, take a look: For those who missed it, this is what the Instagram update looked like before it was reversed pic.twitter.com/hnR3PCjDBh&mdash; Travis (@travislylesnews) December 27, 2018Adam Mosseri, head of Instagram, also replied to several tweets explaining the glitch. “That was supposed to be a very small test that went broad by accident. Should be fixed now. If you’re still seeing it simply restart the app. Happy holidays!” he tweeted. When asked if the design could become permanent, he confirmed that it was just a test. Just a test.&mdash; Adam Mosseri (@mosseri) December 27, 2018Meanwhile, here’s how Twitter reacted: What kind of &quot;bug&quot; comes with instructions🤔 Just admit that you made a terrible update and reverted it quickly after backlash from users😂 #InstagramUpdate pic.twitter.com/SsA1PMF0xw&mdash; Sir Jadeja (@SirJadeja) December 27, 2018#instagramupdate———————Chronological _________Timeline |________________ | | How | About • pic.twitter.com/1mKNAm2XaT&mdash; India (@IndiaSynai) December 27, 2018I missed the #instagramupdate horror, but I just want to say that all of you who survived it are brave and strong. You didn’t ask for this but you are stronger from it. #Brave #Hero #WorldPeace&mdash; Philip &quot;that DeFranco guy&quot; DeFranco (@PhillyD) December 27, 2018instagram pressing release on the #instagramupdate like: pic.twitter.com/APUPIv9ofi&mdash; Felix (navidad) (@felixrackers) December 27, 2018instagram rn #instagramupdate pic.twitter.com/3iZgA5QP6T&mdash; dbrand (@dbrand) December 27, 2018Instagram seeing everyone complaining about the new update #instagramupdate pic.twitter.com/mEaeYtOvQg&mdash; esma (@esmemeh) December 27, 2018Instagram can fix the ugly update quickly but still can’t put my feed back in chronological order? 😩 #InstagramUpdate&mdash; LukeBlackmore☁️ (@BlackmoreLuke) December 27, 2018Instagram literally went “felt cute but might delete later” #instagramupdate&mdash; Basma (@basmahxmde) December 27, 2018instagram when they saw the update wasn’t a hit: when they quickly remove it:#instagramupdate pic.twitter.com/UHqrOxphRb&mdash; 🌸 𝔄𝔫𝔶𝔢𝔩𝔦 🌸 (@localsatanicboy) December 27, 2018What do you think of the horizontal scroll?