A notice with the ID etc

[Mte90]

I am getting this issue: https://wordpress.org/support/topic/dismissible-notices-handler-error-a-notice-with-the-id/#post-16610599

I saw also in some cases locally to get that error but it wasn't clear why. Maybe in some cases wordpress register twice the same notice.
I think that

WP-Dismissible-Notices-Handler/handler.php

Line 297 in 062b147

self::$instance->spit_error(

this code should be executed only when WP_DEBUG is true, to avoid confusions on the users.