### Version 2.5.16 ### Reproduction link [https://jsfiddle.net/yyx990803/xkkbfL3L/?utm_source=website&utm_medium=embed&utm_campaign=xkkbfL3L](https://jsfiddle.net/yyx990803/xkkbfL3L/?utm_source=website&utm_medium=embed&utm_campaign=xkkbfL3L) ### Steps to reproduce https://www.youtube.com/watch?v=y8CASLitwdw 1. Type into input/textarea with Android (don't have iOS to test with) ### What is expected? Input data should be updated per keypress ### What is actually happening? Input data is only updated after a space is pressed --- Reproduced on Android 7.1 Chrome 66 and Android 4.4.2 Firefox 60 <!-- generated by vue-issues. DO NOT REMOVE -->