Hi,
Try using the method "setShowNoData(false)" on your table object, or you can add the property "showNoData: false" on the object passed to the constructor. It removes the "No Data" text altogether. There is a similar method "setNoData(...)" which can be used to change the text if you wish.
If this doesn't help with the flicker, share an example of your update/refresh/binding code. I suspect it may be that it has to remove all the objects in the table then recreate them again from the newly read data rather than direct replace that causes your issue.
Hope this helps,
Oli