ovr_Notification_GetRoomInvites sender id is 0

We are implementing Oculus room invites in our game.  We can poll for notifications with ovr_Notification_GetRoomInvites, get the array from the message, iterate over that, and pull out the room id and the notification id successfully.  However, calls to ovr_RoomInviteNotification_GetSenderID always return 0 for sender id.

We can also get sender id successfully from invites that come through ovrMessage_Notification_Room_InviteReceived, but that is not enough to make a list of existing invites.

Is this a known issue?  We are using libovr version 1.40.0, Unreal 4.24, and testing by passing invites between two Oculus Quest devices - an original Quest and a Quest 2.