Movements between folders is very slow

Dear all,
I have SONY television with Android. On the previous version all was correct. After software update to version 1.70 is appears problem with view pictures. Problem appears in the connection throw USB and on the media server Synology DS214,DS415 too. During the view Kodi close spontaneously, movements between folders is very slow. View Video files function correctly.Could you please recomend me some upgrade or advice how to fix problem ?
Kind Regards
Radek Havlicek