Endpoints for front page return 404

[sccr410]

When creating a new endpoint rewrite rule, assigning a page as the Front Page, the end points for the front page return a 404.

Example:

add_rewrite_endpoint( 'endpointname', EP_PERMALINK | EP_PAGES );

Create a page, call it Test which normally use a URL like www.domain.com/test

Make Test the Front Page.

If visiting a URL like: www.domain.com/endpointname/whatever - this returns a 404. This should load the home page with the endpoint rewrite rules in place.

If visiting www.domain.com/test/endpointname/whatever it works fine.

[SergeyBiryukov]

Related: #23867

[swissspidy]

Duplicate of #23867.