Mine timed out when I bought our tickets because I got the Woody and please wait message forever. I had to go on my phone (another tab wasn't working either) and log into my Disney account and go in the cart to finish buying the tickets. By the time all that was over, it stuck me in a brand new queue for the reservations. Luckily, the friend I'm going with had 2 queues open with 15 min left, so we used hers.
So yes, can confirm.