Playground adding 4 space tabs

[WORMSS]

Vue version

Live Playground

Link to minimal reproduction

https://play.vuejs.org/

Steps to reproduce

Add a new tab, press the [tab] key

What is expected?

2 spaces

What is actually happening?

4 spaces

System Info

No response

Any additional comments?

As requested by @sodatea I am linking back to #9329

This time I made a video since it kept reoccurring on every tab. https://streamable.com/1b7x02

[Alfred-Skyblue]

Regarding the matter related to the repl, let's address it in #3450.