I think this must be a bug introduced with 188.8.131.52.something.
When I upgrade from asterisk-184.108.40.206.1 to asterisk-220.127.116.11.2 or 18.104.22.168,
my AEL Dial() commands with the “U” options fail with the following error:
[May 3 12:05:54] ERROR app_stack.c: Attempt to reach a non-existent
destination for gosub: (Context:screen, Extension:s, Priority:1)
Here are the segments of the ael: