P325 Call Hangs on Hang Up

I have some new P325’s that I have configured on a new pbx. Everything seems to be working great, but when it comes to disconnecting the call.

When caller hangs up it takes about 15 seconds for the call to actually disconnect. END CALL button on phone does not work either regardless of how many times you push it. This happens on both outbound / inbound calls.

I am on Firmware 4_8_2

Any idea’s?

Issue was resolved. This was a hosted system and for some reason this PBX had the wrong IP in the Asterisk General SIP Settings.