This is rather a visual problem than a real bug. I wanted to report it but can't find the page where you can report such things.
By default autocomplete Widget shows a cross on the right side of the input element, that also can be disabled by "clearButton: false". The autocomplete Widget in my project has a set "padding-left: 20px", so the text will not be hidden by a magnifying glass (see attached screenshot). The weird thing: Using "padding-left" also affects the clearButton position and moves it further into the text area. The visual effect is not that nice. I understand that the clearButton should not hit the right border but its position should only be affected by padding-RIGHT and not padding-LEFT. I disabled it for that reason.