Moving the mouse over the null text, the text flickers. This behavior is observed in the following list of controls: 

• RadMultiColumnComboBoxControl
• RadDropDownList
• RadDateTimePicker

It could be observed in other controls where the input element is RadTextBox and the null text property is set.

This behavior is not observed in standalone RadTextBox control.

Text is clipped in Fluent and Breeze theme

To workaround this, we can set the EnableRadAutoScale property to false.

RadControl.EnableRadAutoScale = false;

This scenario is observed in .Net6. When we place one RadTextBox control and run the application, the control is not scaled correctly.