I installed the theme version 9.0.4 on a new domain, and the problem is still there.
I deleted everything and then installed the theme version 9.0.1 and the problem disappeared.
https://www.dropbox.com/s/oqbcikctztu7x7t/2023-02-25_211944.png?dl=0
please check it yourself, “Enable Single Product Builder” does not work with version theme 9.0.4 , but with version 9.0.1 it works fine.