Class value 'selected' disappears when dismount another element

[baur]

Class value 'selected' disappears when dismounting another element

return <Container maxWidth='lg' sx={{mt: '20px'}}>
        <FileBrowser
            files={files}
            icons={Icons.FontAwesome(4)}
            headerRenderer={null}
            onSelectFile={onSelect}
            detailRenderer={() => null}
            canFilter={true}
        />
    </Container>

...
      <FileNavigator onSelect={fileSelectHandler} />
        {!isHomePage && <OnlyOffice config={{ ...config }} />}
...