Thanks, jhull. If it makes a difference, I use Pocket Casts. I think it looks at rss feeds or something like that. I'm not sure; I'm not totally literate on the technical aspects of podcast feeds.
There have been a couple times before that a few months went by without new episodes only for them to all show up at once, and I thought this might be the same. There's such a wealth of back episodes I still haven't listened to that I only recently realized it had been so long since I saw anything new.