Exception in Slate (RTE) when pressing enter or backspace

[kien5436]

I use slate (https://docs.slatejs.org/) with preact, all things in the latest version. The problem begins when I used preact hooks.
Slate provides rich text editor and comes from react. When used it with react, everything is ok, but when used preact, my app was crashed.
I think there is a problem with preact hooks
This problem only occurs in Firefox

Reproduction

Error screen:

Sandbox: https://codesandbox.io/s/youthful-boyd-z3l36

Steps to reproduce

Run the app, type something then press enter or backspace

Expected Behavior

The Slate editor adds new line or deletes characters

Actual Behavior

App is crashed

[kien5436]

For the title, I've tested draft-js and the result is same. This is a hook problem.

[sventschui]

This is not related to hooks but rather FF not implementing onBeforeInput but slate relying on it. React ships a rather incomplete polyfill that breaks with spellcheck/autocorrect.

I'll close this as a duplicate of #1422, have a look at the comment I just left there.