Not sure. I never encountered any issues, but then I don't use Safari much as I prefer FireFox for iOS. Macrumors has a short article about it:
http://www.macrumors.com/2016/03/31/...ses-ios-9-3-1/
Quote:
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Shortly after iOS 9.3 was released, a number of iPhone and iPad users found Safari, Mail, Messages, Notes, Chrome and some other pre-installed and third-party apps would crash or freeze after tapping or long pressing on a web link.
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