🇵🇱Poland @lord_t

Sure, understand. Let's keep it closed, however if somebody needs a patch here is one.

I've spotted it depends the link from which you are editing.
If you edit from
/admin/structure/menu/item//edit (this is the link from "edit" on menu positions list)
then it is fine.

But if you edit from /admin/structure/menu/item/ (this is the link which you can find when you are on translate tab, it's the link of tab) then "Enabled" will be not checked if current domain is not selected in "Show menu item only on selected domains" and other domain is there selected.