J5.x:Pagination broken for Smart Search
From Joomla! Documentation
Errors reported
Smart search loses search and filter parameters when going to page 2 or up.
Versions affected
General Information
This pertains only to Joomla! version(s): 5.1.3, 4.4.7
What is the cause
J5.x:Pagination_class_removes_query_parameters filters away this parameters.
How to fix
Update to 4.4.8 and 5.1.4 or apply the following changes from https://github.com/joomla/joomla-cms/pull/43953/files