Sorry for the late response.
I see the problem now. Some of the features of of the settings box are not used when it’s in “block” layout mode.
When testing, I’ve found that most of the themes use better matching color schemes for fieldset elements. The “hovering” layout is different though, because it has to match the search settings icon as they are essentially connected.
I suggest using some custom CSS. If you need any help with that, let me know.Best,
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