Can't change Forge table THead fixed front

Hello,
I’m having a problem with the UI kit element table and specifically with the THead.
We have some selects with options just above the thead but when I unfold the options this shows underneath. I’ll attach a screenshot:
image
I’m using the basic table:
import Table, {
Cell,
HeadCell,
Row,
SortableColumn,
TBody,
THead,
} from ‘@atlaskit/table’;
I’ve tried to change the styles (zindex) but the problem persists.
Please if someone has had the same problem or knows how to solve it I’ll be grateful.
Thank you :blush: