This is a test-case for HTML page with a search-box that internally changes the search-box value attribute to all-lower-case, while continuing to display the search-box value property in mixed/upper case (however the user entered it).
To test, type in UPPER-CASE LETTERS to the text box.
Going directly to the test page origin server, things work as they should: the search-box text remains in UPPER-CASE (the value-property) while the value-attribute can be seen as all-lower-case in various Inspectors.
However, going through Safeview, the displayed text also turns into all-lower-case.