When setting value in the timepicker component to empty string, private method _updateValue is not called, therefore no writeValue/valueChanged is called, even though the value itself is modified in the updateHours/updateMinutes etc. methods. This causes error validators to not run.
When setting value in the timepicker component to empty string, private method
_updateValueis not called, therefore nowriteValue/valueChangedis called, even though the value itself is modified in theupdateHours/updateMinutesetc. methods. This causes error validators to not run.