Google Voice has a safeguard (presumably to limit routing to automated systems) which detects when a call is being picked up too quickly so routing is unable to connect to any IVR in RC without pressing 1 (or any other digit) to accept the call.
Two possible solutions may resolve this:
1. Ability to delay call pickup time. (ideally assignable to a specific phone number within RC to resolve relevant forwarded calls, leaving the rest of inbound calls unaffected)
2. Ability to direct RC to automatically press a button (dial a number) during call pickup, or at any time. (this could have a wide benefit to various systems which require forwarded calls to have someone dial a number or even input a pin to accept the call.
We think these changes could add wider compatibility, potential added security and more feature rich options that span beyond Google Voice users. Thanks for reading!