As far as I'm aware this glitch has been ongoing for sometime.
I have 2 suggestions for your last second bidder:
Either bid earlier, knowing that the glitch is persistant for the last 10-20 seconds or sign up for a FREE online sniper programme that will bid for them in the last 3-10 seconds of an auction end.
As I no longer trust eBay to register my direct bid on items, I personally now use a sniper and it works wonders 🤗
Truth hurts. Maybe not as much as jumping on a bicycle with a seat missing, but it hurts.
You may think you have pushed ALL my buttons, but you still haven't found the mute!