Pagination for authors

[RobertG]

Hi,

I'm using Abook on a J 5.4.1 website and I have just noticed that in the list of authors, if I select a letter and then try to go to the next page, the end of the address is not added and page 2 displays the second page (A) for a list of all authors.
For example: https://les-livres.de-ergé.fr/les-auteurs.html?letter=M displays the authors whose last name begins with M
If I click on the "2" at the bottom of the page, the address becomes (same problem without SEF)
https://les-livres.de-ergé.fr/les-auteurs.html?start=5 (without &letter=M)
and the displayed page is the second of all authors display.

I couldn't find an option to change this display and hadn't noticed it before.

Can anyone confirm this?
Thank you,
Robert