The app has several grids, each with the filterbar enabled and several of the grids have either data reloaded as the user changes the date range desired for the data. If user has entered something in a column's filter and then reloads the data the filter stays in effect for the new data but the column's filterbar text is not visible. If you out a watch on the column's filter text you can see the text is still there but it is not visible to the user.
I went through several different apporaches to fixing this all of which included setting the column's filterbar text to empty string before reloading the grid. The only approach I found that worked was setting the filterbar text to empty string after the grid's data was reloaded. Even this was not a complete solution as sometimes the filter's text is retained after the reload, even after being set to "", sometimes the filter's text is gone.