It worked this way always. You can check on our demo also. To fix this, update the theme to the latest version where you will be able to set your header height equal to the sticky header height in Theme Settings -> Header. It will remove this effect.
So, I have now the last version of Basel.
My header is static on my main page without changing anything in my settings, but keeps streching on my product page…
In “theme settins” “header”, I don’t see any new field to set my header…
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