As a work around and it is a long process but until kinks get figured out this is how I found my subscribed threads...
go to User CP
go to edit options
then somewhere on that page you will see a default thread subscription mode and in that area there is an underlined words (a clickable link) for subscribed threads, click there and it will take you to your subscribed threads, once there you can bookmark it on your computer and you should be able to come back to your subbed threads
edited to add, clemrose's suggestion is much quicker than mine, I totally missed that "View all Subscribed Threads." on the CP page