Thank you!!!
Do you still have that server? Since you talk at the past tense I guess not, right? It would have been interesting to know if Bullfrog workaround worked for you...
As in FreePBX 12 / Asterisk 13?
Any idea of the version of that Asterisk 13? If Asterisk is the culprit it would be something that was added after that version...
Me too, especially when it's my home server.. 
Thank you and have a nice day!
Nick