4-29-2020 New auto-bid rules
We are changing the auto-bid mechanics a little to give better priority to manual bidders. If you are making a manual bid and there is an max auto-bid of the same value, you will win the auction despite the fact that the auto-bid was placed earlier. You will also win the auction if you place a lower bid, and the bot is unable to raise by the minimum amount required without exceeding the maximum auto-bid value.
The change is already active and has been put in place to avoid situations where existing auto-bids could be “explored” by users, without them committing to making an actual bid.