This issue could be observed when using a lot of rows and the AutoSizeDropDownToBestFit
option is set to true. You have to set this property to false
to work around the issue. Presently, RadMultiColumnComboBox
does not support load on demand functionality. We will consider your suggestion as feature request. If many customers require it, we will increase its priority in our TO DO list.
Should you have any other questions, do not hesitate to ask.
the Telerik team
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