DataTable and n_fixed_rows

Hi all,
I put a DropDown up a DataTable with the property n_fixed_rows set to 2

html.Div([
dcc.Dropdown(…),
dash_table.DataTable(…,
n_fixed_rows = 2,
…)

When try to open the dropdown to select the option, the DropDown go under the 2 fixed rows.

Some easy way to resolve?

Thanks in advance,
Vladimiro