How to set-up conditions in backend using the Builder?

Hi

I have created 2 custom fields for the default blog post type:

1. Radio
   Display on Home-News?
   display_on_home_news_sec
   Choices:
   yes: Yes
   no: No

and

1. Date Picker
   Date on Home-News
   date_on_home-news

The 2nd field should be visible in Block-Editor of the post ONLY, if the Choice is "yes: Yes".

So I have opened the "Advanced" tab of the 2nd custom-field and set the "Conditional Logic" as follows:

Visible when "display_on_home_news_sec" = "yes: Yes"

But it's not working. Back in the post-editor, I can still see both custom-fields, even if the first custom-field is set to "no: No".

I have probably made a mistake, so please help.

Thank you in advance and kind regards,
Sascha