If you change the language of the main page (https://wp20.mystagingwebsite.com) to Deutsch, the translated text expands the 'search events' label which breaks to two lines and expands the input field border.

I'd expect input field shouldn't grow to the full height. If it's intentional, perhaps moving the magnifying glass to be vertically aligned to the middle of the field would look better.

Browser: Chrome 111
OS: macOS Ventura

Deutsch:

English: