Activity Chaining is not working as expected

Hello All,

I'm designing one application to update the values in database table, In such a way that the existing values will be displayed to the user in editable grid and user can update any values if needed. This edit option is available in record tab related action section. There are two interface forms designed for showing update success and update failure message after user clicks on update button. Now the issue that is happening here is when user changes the values and click update the flow redirects to update success form but its not visible to the user under current flow. Its available under Task Tab. I have enabled the activity chaining but still the form is not coming up at the same place. Can someone please suggest me why is this happening?

Thanks in advance