Tab key always puts in 4 spaces, no matter what the settings

Just set up PHPStorm on a colleagues machine, but even with all settings set to indent to 2 spaces, tab keeps inserting 4 spaces or 1 tab. 

Auto-format resets everything as expected, but tab doesn't play ball.

This is happening primarily in the script block of a Vue file.

We've tried the following things to fix it, but none have worked:

• default and project settings for javascript (
• editor config (doesn't work for language injection, only full files)
• setting the script tag type to "es6"

Can someone help?