Also, if you're looking for interactables when running old content, the best way to do it is to analyze your GameObject.wdb cache and check ObjectIDs. If they're pretty high (250kish+) then you are seeing something new, which probably shouldn't be there.
This is how I looked for anything else new in Gnomeregan last night, for example. I exited game, deleted GameObject.wdb, then logged in and ran around Gnomeregan. After that, I exited game again and analyzed GameObject.wdb using a template in 010 Editor, looking for abnormally high IDs. The only one that stuck out was the button itself (called "PUSH IT!").
Here is the 010 Template I use for GameObject WDBs:
https://www.curseforge.com/paste/842d2b50