Waiting and long running Open process

Summary:

Too many long waiting open process

Content (please ensure you mask any confidential information):

I have created some new automation agents related to the order management module,
their objective is mainly to release order base in custom way to be single release per instruction (for each ship unit the transport handling unit quantity will be the number of order release) and then i followed this agents with some to cancel and hold order base ( and their where i think the problem resides) through which, when an order is held or canceled i am trying to delete all its related shipments (B,S,A) associated with it's invoices.