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Please note that the provided solution seems to be a workaround for a particular issue. Although the provided details are not complete and could not be determined if this is the only approach to handle the misbehavior.
If you experience similar issue I would suggest you insert a short execution delay after typing the value to be filtered in the Kendo dropdown. Usually the autocomplete filtering requires few seconds to display the entries that contain the entered value and since execution is always faster than recording the speed of running the test needs to be sometimes additionally controlled.
Another important thing would be to carefully choose the find expression for the element to select from dropdown. In most cases you could rely on the exact text content to select the correct filtered item.
Though in case of some particular difficulties you might have please elaborate more on the exact issue and I will be glad to assist you!
Thank you in advance for your understanding and cooperation!