No Cursor on iOS

On TMP input fields I'm seeing no flashing cursor (caret) on iOS, making it impossible to tell which (of several) input field has focus. Once you start typing, it's obvious, but not when the input field is empty. The cursor is visible in the Editor. I tried setting the width to 2 (default is 1), but it's still not visible. I don't see any cursor-related settings, other than changing it's appearance. I don't know what "Hide Mobile Input" means, I can't find it in the TMP manual. Is there some other setting that shows/hides the mobile cursor?