Can't pick up outside call from park

When an outside call is made or comes in and transferred into the parking lot using ##70# no one can pick up the parked call.

If the person who does the transfer uses *270 and does not hang up, someone can dial into 71 and they can talk to the person who did the transfer. Then once the transferer hangs up, the new and original callers are now connected.

However, if after transferring to the parking lot the transferer hangs up, there is no way* to get the call that is now parked on 71. If someone just dials into 71 it just sits there and does nothing (using eyebeam or using our Grandstream phone).

*If I go into iSymphony and double click on the call it will transfer it to me.

I've attached the asterisk log. I'm 4060. I call out to 18009993355 in this example but the same things happen if it is an inbound call. We use Flowroute for our SIP trunk provider.

Since we paid for the Parking Pro module I opened up a commercial support ticket but they are convinced it isn't a commercial module problem since it happens on the free Parking module.