Multiple tasks are getting created for the same user input task in a process model

 Hi, 

We are using Appian version 17.4.

On a click of button, multiple tasks are getting created for the same user input task in process model. We have the functionality of Save and Close button which on close will create a task under Tasks Tab which will open the same screen with previous saved data.

When on clicking the button, it creates two tasks under Tasks Tab per instance.

We are not able to find the root cause since this is happening only in one sub-process, rest are working fine.

Thanks and Regards