In the searchAction of the controller, it is stored in Session/Bag as follows.
However, the array returned by getParams() contains di, and Closure exists in it, so it cannot be serialized, so it fails to save to the session.

$this->persistent->searchParams = $query->getParams();

This failure can be avoided by excluding the key di from the array returned by getParams().
for example

             $params = $query->getParams();
             unset($params['di']);
             $this->persistent->searchParams = $params;

or

$this->persistent->searchParams = array('di'=>null) + $query->getParams();