SearchBarController Search bar hiding tableview cells in case of multiple autolayout constraint - ios

Question

I have two views in my view controller first one is uitableview and the second one is bottom fixed UIView. I have autolayout constraint set up for both views, the table is at top and the second one is fixed at bottom, in the table view I am adding search bar. On the view load everything renders fine but as soon as the search bar is made active, the first two cells slip under the navigation bar. If i remove the Bottom view and bottom constraint everything works fine.
Here is the sample code im running
self.tableView = [[UITableView alloc] initWithFrame:CGRectZero
style:UITableViewStylePlain];
self.tableView.delegate = self;
self.tableView.dataSource = self;
self.tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
self.tableView.rowHeight = UITableViewAutomaticDimension;
self.tableView.estimatedRowHeight = 80;
self.tableView.tableFooterView = [UIView new];
[self.view addSubview:self.tableView];
[self.tableView mas_makeConstraints:^(MASConstraintMaker *make) {
make.leading.trailing.top.mas_equalTo(self.view);
make.bottom.equalTo(self.bottomToolBar.mas_top);
}];
self.definesPresentationContext = YES;
self.searchController = [[UISearchController alloc] initWithSearchResultsController:nil];
self.searchController.searchResultsUpdater = self;
self.searchController.dimsBackgroundDuringPresentation = NO;
// Configure the search bar with scope buttons and add it to the table view header
self.searchController.searchBar.scopeButtonTitles = #[#"Country",#"Capital"];
self.searchController.searchBar.delegate = self;
self.tableView.tableHeaderView = self.searchController.searchBar;
self.definesPresentationContext = YES;
[self.searchController.searchBar sizeToFit];