nonce_life breaks customizer

Hello

When I add following code:

add_filter( 'nonce_life', function () { return 30 * DAY_IN_SECONDS; } );

to the functions.php file (for example twenty nineteen theme) then customizer options aren’t updated after save. Code won’t break customizer if I use it in the plugin but why it breaks customizer if I use it in the functions.php file of any theme?