Created attachment 1090408 [details]
A reproducer process and a possible diff with the fix for this issue

Description of problem:

A signal subprocess in a process is not invoked. Signals send to the process aimed to invoke the subprocess are ignored.

Version-Release number of selected component (if applicable):
Update 3

How reproducible:
Always.

Steps to Reproduce:
1. Create a process and add a signal subprocess to it;
2. Inside the subprocess, add the signal itself, a script task to print some message to indicate that the subprocess was invoked and then an end event;
3. Use a script task to signal the process in the main process flow;

Actual results:
The process is finished without entering the subprocess;

Expected results:
It should invoke th subprocess.

Additional info:

Between update 2 and 3, the engine was updated to invoke process using the signal name, instead the id. The editor still looks for a signal with a given ID instead looking for its name. Further local tests using the branch 6.2.x seems to have solved the issue. 


Attached you can find a simple process that can be used to reproduce this issue and also the diff file of the changes I made locally.