Found random media folder in cache drive

Hi, i was working on adding a temp folder to my cache setup and noticed that there is a season of a tv show listed inside it.

I never had its parent folder (media) cached and while i have the dynamix cache folders plugin, its inactive and never been enabled.

the date of the folder is weeks ago and i have no idea why it alone exists only on the cache drive.

while i know i can set shares to use cache, is there a way to force this for folders within that share?

I was thinking mounting that folder as a share with cache set to no and see what happens.

any help appreciated