Do you have sim-ring enabled?

Happened to my number a few hours ago. Callers got fast busy or ring then disconnect. The house phone never rang. Sim-ring 'ring all' setting was the culprit. 'ring in order' seems to be working.

Will submit a ticket in the morning.
During my testing I disconnected the PAP2 and the Failover did ring. I know sim-ring is beta, but should never affect Failover.