WTH - jumping to next search result in FileEditor (iOS) not possible

In FileEditor (on iOS) when I open the search option and click to enter a search keyword, a line of code (behind the search dialog) is highlighted. After that has happened I can enter the keyword without issues, I can successfully search for it but if I want to highlight the next search result (hit arrow button) this only highlights (again) the line of code behind the dialog. It is not possible to jump to the line where the next search result is located. This renders the search option useless.