Custom theme interferes with Acris Stock Notification Plugin

I am experiencing a malfunctioning of a certain plugin when my custom theme is active.

I noticed that when the custom theme is active, determined calls to the back-end (switch) are not working the same way they would work when the shopware 6 default theme is active.

This interference prevents the plugin to work:

**Can a custom theme make the difference when it comes to backend’s calls?
Is there a way to see the back-end logs related to the incoming calls? **