Why does AK::SoundEngine::Query::GetSwitch return a switch state of 0? [closed]

Question

I'd like to ensure that the value we just tried to set with SetSwitch exists. I assumed I could do this with a call to GetSwitch after the SetSwitch call. We compare the target value we tried to set with the value returned from the GetSwitch call to ensure that they're the same.

However, I find that when calling AK::SoundEngine::Query::GetSwitch the returned switch state "out_rSwitchState" is assigned a value of 0.

AKSOUNDENGINE_API AKRESULT AK::SoundEngine::Query::GetSwitch	(	AkSwitchGroupID	in_switchGroup,
		AkGameObjectID	in_gameObjectID,
		AkSwitchStateID &	out_rSwitchState
	)

The documentation for SetSwitch states that it always returns success (regardless of whether the switch value exists in the project) so its return value is of no use to me.

AKSOUNDENGINE_API AKRESULT AK::SoundEngine::SetSwitch	(	AkSwitchGroupID	in_switchGroup,
		AkSwitchStateID	in_switchState,
		AkGameObjectID	in_gameObjectID
	)

Sets the State of a Switch Group (by IDs).

Returns

Always returns AK_Success

When passed a switch state that doesn't exist (invalid hash/unrecognised string) the SetSwitch silently fails and the switch group is assigned the default switch group value.

I haven't seen anything in the documentation to suggest that making a GetSwitch call straight after a SetSwitch call is invalid so... what's going on here?