Doesnt work with custom posttype?

Hi, first of all, thanks for creating this plugin.

there is something strange going on. If I validate the hreflang with a chrome checker, it does work for posts/ pages

However, if i set it up, the same way, with custom post types (with elementor plugin), it is not passing the validator.
The hreflang tags do show up in the source code. What can it be?