I have 4 Snom 820 phones (all on the same firmware) and after the latest PBXnSIP update, one of my phones has a dialing problem. When I enter the 4th digit of the number, the phone will auto-dial the 4 digits which are not a valid destination. My other three 820 phones don't do this and they all boot from the same domain and PBX. Any ideas on what's causing this - the phone is currently unusable as a result.