conflict using Table of Content in combination with Rootstrap theme

I encounter a conflict using Table of Content plugin in combination with Rootstrap theme.

In my rootstrap-child theme I succesful deregister both rootstrap-bootstrap and rootstrap-icons to prevent loading bootstrap.min.css and font-awesome.min.css.

After I activate the Table of Content plugin I notice that both css files are loaded again. Not in the header but in the footer instead. And the ID’s are rootstrap-bootstrap-css and rootstrap-icons-css.

Is this something Table of Content is causing?

https://www.ads-software.com/plugins/table-of-contents-plus/