first time ,it has a cursor so that we can write or delete our text
next time , when we click outside the text box and then again click into the text box now ,the cursor has gone and whatever we want to write over here will not show till the soft keyboard will be hide
next time again if we drag our text box upward or downward then ,it shows the cursor into the text box. but if we click it outside the textbox and then again it has the same problem persist