I think that many of the sellers who were using classic view have been changed to the new view which apparently does not have bulk edit for active listings. I don't know if that has anything to do with your problem.
Out of curiousity, what is the url on your classic view? If you can copy and paste it, someone else may be able to get back to their classic view page by using it. Don't worry...it won't take them to your page unless they are signed in as you. 🙂