Those who use the companion app might be aware of the bidding glitch. You click the bid button, but you just get an error. Sometimes this is because the last bid hasn't updated, but this still happens even if the bid is accurate, you just cannot bid and sometimes miss out on good deals.
In the past my only solution was to restart the app to be able to bid on that item. What I figured out, so far this works is to quickly clear your transfer target list. Viola, after that I was able to bid again without restarting the app.
I still have to restart the app every 30minutes because things become invisible. Typical
Click on compare price and usually the one you've bidder on is the first one on the page. Up your bid and then it should be okay for a little while again