No, this shouldn't happen. At an in-room auction, the auctioneer will make eye contact with each bidder when they start bidding and seek confirmation that they are bidding intentionally before accepting the bid.
The online bidding process has been designed in a way to ensure that accidental clicks don't result in a bid submission, for example you must confirm you want to bid after submitting and keyboard shortcuts have been disabled. You can learn all about bidding at property auctions.