MPC-HC resizes subtitles but doesn't resize symbols

Here's what I mean:

https://preview.redd.it/g84fl83cndtd1.png?width=1443&format=png&auto=webp&s=1974f4c6aced72333520edf039e546b1d396a2c6

I have resized subtitles from size 18 to 28 (and changed font from Calibri to Sans Serif). But as you can see, all the symbols remain at 18 size.

A MPC-HC restart doesn't change anything. Any clues, please?