Yuan

Editor will crash after input Chinese in FireFox

4

**Description** Editor will crash after input Chinese and then input something more in FireFox. **Recording** https://user-images.githubusercontent.com/22148349/154881576-b71d7c3c-d81d-4e52-83c1-1a0e3e616c28.mov **Steps** reproduce: 1. Input something in Chinese like 你好(ni hao) in https://www.slatejs.org/examples/richtext in FireFox....