Looking again, I'm not sure what the modem/10/a is supposed to be
There is a such thing as modem/a/<number> but
if you are looking to bridge to slot 23 try
modem/23/${destination_number}
if you are getting a different slot maybe you simlinks are messed up, you need to make sure they are recreated whenever you restart so maybe that patch you are using has an issue.
BTW I would not have asked to see the real log if I didn't mean it.
I generally dislike pre-chosen log snippets, you have no idea what I may be looking for.