Pagination problem with Polylang 1.8.1

Hello,
I came a cross an issue which may relate to 1.8.1 update of Polylang.
On a taxonomy archive that uses pagination (based on twentythirteen_paging_nav),
the link to page 2 looks like http://sitename:8888/category/books/page/2/.
But when you navigate to that page the :8888 part of the url is removed like http://sitename/category/books/page/2/.
So you get a 404.
Reverting to 1.7.2 or deactivating Polylang and the link works correctly.
This is on a MAMP dev site, that’s why the :8888 is in the url.
Have not tested it on the live site, so I’m not sure if a .com url also gets removed.
In case of anyone else encounters this problem.
Peace

https://wordpress.org/plugins/polylang/