Bidding is non-deterministic

Unfortunately, Bridge Baron either peeks and uses knowledge from human played hands in its replay or its bidding is non-deterministic (the bidding and even the play sequences are different when I play and when the computer plays the same hand for duplicate scoring. Here is the situation in duplicate play:
1) I am South. The bidding goes in a certain sequence. I make certain bids.
2) Computer replays the hand for duplicate scoring. It starts with the same opening bids, and then bids the same bid that I bid when I bid my hand. So far we have the exact same bidding sequence in 1) and 2). At this point the computer makes a totally different bid than in 1) and because of this achieves a higher score.

Andy on iPhone about Bridge Baron, v3.52