This has something to do with the class header.wrapper.base not being applied in the elseif branch.

@if ($header && ! $header instanceof \Illuminate\View\ComponentSlot) <div @class([$personalize['header.wrapper.base'], $colors['background']]) x-bind:class="{ '{{ $personalize['header.wrapper.border'] }}' : !minimize }"> --- </div> @elseif ($header instanceof \Illuminate\View\ComponentSlot) <div @class([$personalize['header.wrapper.border'], $colors['background']])> --- </div> @endif