https://www.theverge.com/2019/1/22/18193126/apple-ios-update-12-1-3-now-available-iphone-ipad

Apple is today releasing iOS 12.1.3 for the iPhone, iPad, and iPod touch. The update doesn’t contain any new features, but it does fix a few frustrating bugs that you might have experienced lately.

For me, the most noticeable among them has been “an issue in Messages that could impact scrolling through photos in the Details view.” See, if you tap on a contact’s name in a Messages conversation and then choose “info,” you’ll be taken to the Details page. The bottom half of this screen shows you any photos or videos you’ve exchanged with that person, which is a convenient way of finding a certain image or just scrolling back though memories.