Wp_redirect to blank page

trellis
1

I’ve installed Trellis today, with all the latest updates.
All works, but I have problem with wp_redirect it goes to blank page.
I don’t get ‘headers already sent’ error, just blank page, http status 200.

I have tried to turn on output buffer, but it doesn’t resolve the issue like expected.

I’ve added:

add_action('init', function () {
	ob_start();
});

If I try to do eg:

add_action(‘template_redirect’, function() {

if ( is_page_template('tpl-something.php')) {
	wp_redirect( 'http://www.some-url.com');
	exit;
}

});

It just displays blank page.
Same is in wp-admin, when I save post, activate plugin… blank page.
I have also added:

output_buffering = on

to php.ini, but that doesn’t help either.
Any suggestion welcome.

Update

It’s funny, when I add filter:

add_filter( 'wp_redirect', function( $url ) {

	header("Location: $url");
}, 10, 3 );

so it’s obviously something with server config and I can’t figure what’s wrong.