font size cant't be changed in gutenberg block about hueman

Thanks for reporting the problem.
Can you provide a detailed step by step procedure to reproduce the problem ?
Which block should I use to reproduce the issue ?
Can you confirm that you use the latest version of WordPress, the latest version of Hueman ?

[hosseinfarnia]

Yes, everything is the latest version,
I've provided the screencast below for better understanding:
https://screencast-o-matic.com/watch/crhZQTVfWfi

The problem is the header block.
In fact H2 is the same size as H1 and is very large, I want to make it smaller, but nothing happens.
Logically H2 should be smaller than h1 and so on. (this is what I see on other themes)
I didn't test h3,4,5,6 deeply, but those seem to have the same problem.

Do you need more information?