Subprocess and it's associated User Tasks do not abort when parent process is terminated by signal or process aborts

Issue

• There are two scenarios where Subprocess (Reusable) and it's associated User Tasks are not aborted after a process is terminated (via signal) or aborts.

1. User is allowed to terminate the main process at any time. This is done through the Business Central by signaling an event to terminate. However any running User Tasks are not aborted.
2. The parent process comes to an end before all tasks in a Subprocess are completed. The Subprocess terminates but the User Tasks are left active.

The problem is that these tasks appear in the users task list, even though they can't be completed. Is there a way to either-
1. automatically close all tasks when the process ends
2. query the task service to only return user tasks for which the parent process is active?