Whether it is actually a "bid" or more likely an "offer", you don't "fix" it. Welcome to the group(s) who are required to pre-authorize payment to place a bid and/or to make an offer.
eBay has been "experimenting" with requiring pre-authorization of payment for Best Offers for over a year and a half (started prior to Halloween 2021), adding more and more users into the test group required to do so (sellers can opt their listings out of it; buyers cannot opt out once they are assigned). Too many users were making offers and then not paying when it was accepted, and too many of those were scammers who would try to get the seller to text or email them to get their number/email address to send fake payment messages to.
Not sure whether or not they have officially made it permanent yet or it continues "experimentally." They started trying it out on auction bids (with a smaller group of buyers that is growing) in Spring or early Summer 2023.
