Duplicate input when I type Chinese and then keydown a 'Enter' on Macbook Chrome

[liaoyalien]

It's a very odd issue that only happens to Chrome on Mac.
When I type in Chinese and press a enter, my input will be duplicated.
It will back to normal if I disabled the keydown event 'inpute.form-control' which is fired by vue from Event Listener.

But I don't know how to fix from code. Any suggestion is appreciated.

This is a video to explain the scenario.
https://youtu.be/ALXHIURDnJg