Java dialog box is blank in 2nd attempt while using timer.

Dialog box opens and having data , Yes or No options to select.Java Option dialog box opens up in first attempt successfully.
Once then after editing some data and click on Submit.
timer request is called again and now 2nd time java Blank dialog box is opened and only dialog title message is visible.



Java dialog box is called from timer schedule..Kindly see the attachment image

Pls let me know if any information needed further here

Suggested reading:
How to make dialogs
How to ask qeustions