BuddyPress.org

You don’t say which BP Template Pack you are using.
Or if you are using cover images on profiles.

If you are using the BuddyPress Legacy pack – open the appropriate file from these choices:

buddypress\bp-templates\bp-legacy\buddypress\members\single\cover-image-header.php
buddypress\bp-templates\bp-legacy\buddypress\members\single\member-header.php

And find: do_action( 'template_notices' );

If you are using the BuddyPress Nouveau pack – then the direct call is not in a template.
Look this function bp_nouveau_template_notices() in
buddypress\bp-templates\bp-nouveau\includes\template-tags.php

Make sure that you are not running any code that filters notices.