I can confirm this 'bug' still exists, unless its by design and trademe no longer want you to be able to view a finished auction you missed out on which would be good to be outlined in their documentation

Thanks for the Tip Andy, for me the issue did come down to an upgrade of the TradeMe App, I thought it would auto update, but manually updating the app now shows me the the items I lost that were on my watchlist. Would of been good if that was the original recommendation from the TradeMe responses or even added to the support/help documentation. Doesn't work....update the app on your device?.