Q: Smart Playlists randomly changing their media kind to "Podcasts" bug?

This began happening with iTunes 12.4. Smart playlists I have had for years and that I use mostly to sync music to my phone that will rotate according what I do or don't listen, began at some point appearing completely blank. After some tinkering around, I noticed in their criteria, all of them had had their Media kind changed to "podcasts". When I set it back to "music", everything worked again as normal. The problem is, it keeps happening. Now every time I sync, I need to check each playlist to make sure it hasn't reverted to an empty "podcasts" playlist. This is incredibly annoying. Is anybody else seeing this or am I the only one?