### Version 2.5.16 ### Reproduction link [https://codepen.io/anon/pen/LrMKMg?editors=1011](https://codepen.io/anon/pen/LrMKMg?editors=1011) ### Steps to reproduce type in the input ### What is expected? `'input'` should be logged once ### What is actually happening? `'input'` is logged twice --- Uncomment `delete ctx.data.model` and it works fine Original pen using vuetify: https://codepen.io/anon/pen/QxzXYK?editors=1011 <!-- generated by vue-issues. DO NOT REMOVE -->