Grid: FixedHeader="True" prevents background colors from being applied correctly in the header.

[MaMon1963]

In an attempt to color the filter row differently from the grid header row, inspired by the transitory solution you kindly provided, I experimented with version v3.0.0-preview.3 on my webassembly application. The result was that the header is colored correctly after setting the "--bb-table-sticky-background-color" parameter to "none", but unfortunately when scrolling the table the header remains fixed but becomes transparent.
Hoping that this can somehow stimulate the solution to the problem, I report here the configuration data and the visual result:

GRID SETTINGS IN RAZOR PAGE:

<Grid @ref="grid"
      TItem="ProdottoDTO"
      Class="table table-hover table-bordered table-striped align-middle"
      DataProvider="ProdottoDataProvider"
      FixedHeader="true"
      AllowFiltering="true"
      AllowPaging="true"
      AllowSorting="true"
      AllowSelection="false"
      PageSize="@pageSize"
      FiltersTranslationProvider="SRB_BBCommon.GridFiltersTranslationProvider"
      GridSettingsChanged="OnGridPDSettingsChanged"
      SettingsProvider="GridPDSettingsProvider"
      HeaderRowCssClass="bg-primary text-white border-bottom-0"
      FiltersRowCssClass="bg-success text-white bg-opacity-25 border-bottom-0"
      Height="690"
      EmptyText="Non ci sono dati da mostrare"
      PageSizeSelectorVisible="true"
      PageSizeSelectorItems="null"
      PaginationItemsTextFormat="{0} - {1} di {2} elementi"
      ItemsPerPageText="Elementi per pagina"
      Responsive="true"
      Unit="Unit.Px">

---

FILE app.css extraction:

:root {
    --bb-table-sticky-background-color: none;
}

Grid view at first line (even when returning after scrolling down):

Grid display when scrolling down...
...only the header background (not header fields and related texts) scrolls up...

...then continuing to scroll background disappears:

[muthu04439]

@MaMon1963 I'll check this scenario and get back to you.