WP Show Posts Title tag

Hello,
I have the following problem:
I use the Generate Press Theme + WP Show Posts by Tom Usborne.
In the WP Show Posts, I want to oppress the title tag on image hover.
Tom suggested the following code

add_action( 'wp', function() {
    add_filter( 'wpsp_image_title', '__return_false' );
} );

or
add_filter( 'wpsp_image_title', '__return_empty_string' );
Both codes don’t work when Clearfy is active. If Clearfy is disabled, it works as expected.

As I am not able to find the problem on GP and WPSP side, I want to ask you to investigate the problem on your side.
Thank you

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