The animation of the inbasket pop-up form is stuck

Hi All,

I use aras12 SP9.

When signing off in the inbasket, I created a Button at the bottom to display the file content in a pop-up window. The code is as follows. However, recently it often gets stuck on the following animation.

 InBasket-VoteDialog.aspx()

 (Self-added Button)

 (animation stuck)

can anyone help me?

Thanks!