Auto line height in a text box

Hi there,

Looker Studio lets you choose among several different line heights for your text (12 px, 16 px, etc), including the option “auto”, which should adjust line height automatically so that your text fills the box containing it:

However, this “auto” option is not doing anything for me. The text stays unchanged, no matter what line height it had before setting “auto”. Is this a bug? Am I missing something?

Regards