[Bug] n.closest() not a function

[LasseRB]

Hi there! I'm new here!
I was playing around with EditorJS in firefox when I suddenly get a Uncaught TypeError: n.closest is not a function exception. I get this on the editorjs.io website as well as my own projects.

Steps to reproduce:

1. Go to editorjs.io and open the console in the dev tools
2. Scroll down to the editor_landing demo on the front page.
3. Remove a block using the tune settings button.
4. You should get a exception in the console which stems from a get() command in editor.bundle.js

Screenshots:

Device, Browser, OS:
MacOS Mojave Version 10.14.6
Firefox 80.0.1 (64-bit)
Editor.js version:
In my project, the version of EditorJS is 2.18.0.

Let me know if you need more information or if I'm missing something obvious.
Thanks!

[bobmagicii]

i am also seeing this error when deleting blocks. also on firefox.

[fouchekeagan]

I am also getting this error on firefox.

[muster-mark]

Happens when moving or deleting a block

[emirsagit]

I am also getting this error on firefox.

[slaveofcode]

Me too, error on firefox 82.0.3 (64-bit)

[drj-sharma]

same

[bobmagicii]

the editor is working but i am a saddened by no response, convinced myself to switch to this project a few months ago and now im a little concerned. i mean it didn't cost me anything other than time but i really like how this works.