I am sorry to hear about the issue with the AutoCompleteView clear button.
Let me get straight to the questions:
1) Template for close button? - RadAutoCompleteView does not provide template for its input field and clear button. The available templates are described in our help article:Custom Templates Overview
2) Did you test your component ? - Yes, I can assure you that the control is tested from our QAs.
3) Issue with clear button? - As we haven't been reported such an issue, I will need some additional details on your setup. Which displaymode is used plane or tokens? On which OS device/emulator the issue can be reproduced? Versions of Xamarin and Telerik used in the project?
I have tested on my side on Android and on iOS but I cannot reproduce the described issue. I have tested our SDK Browser examples and SampleDemo application
Please open a support ticket and attach a stripped-down version of the project where the issue could be reproduced. In this way we could research the case further. Also include the additional details asked above.
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