search problem with Polylang

the search bar is active only on mobile

this is the correct search URL for the Hebrew language
https://www.motafrank.com/he/?s=%D7%93%D7%93

and this is what the search bar gives me
https://www.motafrank.com/he/%D7%A2%D7%9E%D7%95%D7%93-%D7%94%D7%91%D7%99%D7%AA/?s=scads
what leads to a 404 page
how can I change the settings of the Polylang search bar

The page I need help with: [log in to see the link]