TL;DR

Mojolicious::Plugin::OpenAPI was updated to address Issue Response reference ignored and overridden by DefaultResponse, yay!

Recent post Perl OpenAPI with Mojolicious gave a very quick overview on how useful Mojolicious::Plugin::OpenAPI is and pointed out a small bug regarding error management.

Wellโ€ฆ it turned out that the bug was in JSON::Validator instead, but luckily they are both under the care of Jan Henning Thorsen, who fixed the bug in the module and bumped the minimum needed version in the other one, so that it will not suffer from the bug.

Thanks Jan Henning Thorsen!