Example of filtering the Seconard blocks plugin when viewing EE admin pages. If admin_head returns no post type and secondary blocks runs then it returns ALL blocks, lets stop this for Event Espresso pages.

example.php

<?php //Please do not include the opening PHP tag if you already have one.

function tw_ee_stop_secondary_blocks_plugin( $secondary_blocks ) {
		//Get the currency screen
		$screen = get_current_screen();

		//Check if within EE using the current parent_base and see if we have a post type
		if($screen->parent_base == 'espresso_events' && empty($screen->post_type) ) {
			//If within EE and we don't have a post type return no secondary_blocks
			return array();
		}

		return $secondary_blocks;
}
add_filter( 'secondary_html_blocks_pre_editor', 'tw_ee_stop_secondary_blocks_plugin');