Captions are displaying twice, and the second one can't be turned off

I'm on the new version of Premiere, and I have a 608 track that can be enabled and edited as designed. However, rendering OVER that in the Program Monitor are the same titles again in the style of 608 captions of Premiere 14.x. There seems to be no way to toggle these titles off, and they do not respond to editing the caption text. However, if I edit the text, save the project, close it and reopen it, the old style 608 titles will reflect whatever changes I had made before reopening the project.

If it helps, I notice the old style 608s disappear whenever I go into caption text edit mode directly in the program monitor. They reappear back over top of everything as soon as I leave the text box.