Problem with characters in Greek in html5 during converting files from FrameMaker 2020 and 2022

I have 2 problems during generating html from FM:

1. Biggest - When generating html5, characters in the language Greek, look like corrupted. That happens in only this language.

html:

FM:

This happens in FrameMaker versions 2020 and 2022. In version 2019 the problem doesn't exist.

My settings in .sts file look like:

2. Slash and hard space are displayed incorrectly in headings html's (also version 2020 and 2022)
1. slash

slash doesn't exist in headings.

2. hard space

Sign __160 replaces hard space in headings html's.

I think that is bug of software. In earlier version program, I don't had these problems.
I am asking Adobe to intervene in this matter. Thanks.