Task with Status Submitted

Hi,

we have a process with 2 tasks. When the first task has been completed, there is a subprocess that elaborate different script and, simultaneously, second task has been opened in chaining. Second task is used to preverse chaining in the process, meanwhile the activities of subprocess are on working. Until the subprocess has not been completed, if user click on submit button, task has been generated, This is simple example:

Sometimes, after completed the second task (without subprocess completed), system regenerate the task with SUBMITTED Status and user cannot retrieve it in the task list.

Do you encounter this problem? Is there a way to solve it?

Thanks in advance.

Regards,

Juri Monti