Autofill suggestions don't work when the login form field is in focus

Hello,

I have a problem with bank login webpage - https://www.ipko.pl. When the web interface language is set to English, the autofill suggestions work perfectly when the login form field is in focus. The autofill suggestions appear just below the form field. But when I switch language to Polish or Ukrainian, it does not work. It is just on this page, I checked other bank webpage and autofill suggestions work fine for Polish. Any idea how and if there a way to fix it? I'm afraid, I will not make the bank to change their webpage code :)