Thank you for response. :-)
I tried to call read(), but it didn't get any positive results. I tried to define like this:
<select kendo-drop-down-list k-options="typeListOptions" k-ng-model="selectedType">
<option disabled>Choose a character</option>
<option selected value="Crocodile Gena">Crocodile Gena</option>
and of course kendo-options don't contain datasource, but still I'm getting a delay before first opening.
So , it's interesting that our tester told me that it occured when we increased version of Kendo to 2017.1.223.