filtering issue - virtualization - missing scrollbar in dropdownbox, combobox

[Danny]

Hi,

I am having issue with filtering in dropdownbox.  the dropdownbox ultilizes virtualization and has 7000 rows of data.

please see below pictures for details

Step 1: work perfectly - filter by "te"

Step 2: work perfectly - filter by "tee"

step 3: fail - filter by "te" - remove "e"

my code

<kendo-combobox name="combobox" [data]="filterData"
            [allowCustom]="true" [filterable]="true" (filterChange)="handleFilter($event)"
            [valuePrimitive]="true" [textField]="dropDownTextField" [valueField]="dropDownValueField"
            [readonly]="myReadOnly" [required]="myRequired" 
            [virtual]="virtualDropDownList">
 </kendo-combobox>

 

Thank you