Steps to reproduce the issue

Create a blog view in a multilanguage site.
Browse any pages but the first page of the blog.
URL should be something like this for a French page: https://www.mydomain.com/fr/sefurlformyblogfirstpage?start=42

Expected result

The URL should be something like this for the associated page in hreflang in English for instance: https://www.mydomain.com/en/sefurlformyblogfirstpage?start=42
The autoreferential URL in hreflang tag should be: https://www.mydomain.com/fr/sefurlformyblogfirstpage?start=42

Actual result

The associated page link in hreflang code and in the language module is: https://www.mydomain.com/en/sefurlformyblogfirstpage which makes you land to the first page of the blog AND which is not good for SEO as the hreflang associated link is wrong.

The autoreferential hreflang tag address for the example URL above is: https://www.mydomain.com/fr/sefurlformyblogfirstpage

System information (as much as possible)

Additional comments

Tested on Protostar, Joomla 3.9.4