NO BUG: Line height or Letter spacing "point" vs "comma" value

I just noticed that it’s not the same to use 1.5 than 1,5. Is this a bug or it’s supposed to work this way? For example I’m experiencing this on Typography letter spacing or height. Using Bricks 1.9.4

I don’t quite understand this one, why would you use 1,5? only 1.5 work and that’s kind of a rule in css.

1,5 is not a valid CSS syntax.