Hi Marco,
Originating calls in asterisk will ring your phone first. It seems its your phone blocking the originate command because it has your own callerid. I have seen other posts about users with that problem because their phones reject that call. It is not FOP2 that rejects, its your phone. In FOP 2.26 and other versions worked the same, so I do not think it is something that have changed (at least not significantly) in 2.27.
You should configure your phone as to allow that inbound call event if it has the same callerid. You can test with a soft phone instead of a hard phone and see if you experience the same or not.
