Each time I write a new post, I get a ton of pre-filled custom fields. They're filled with unrelated images, thumbnails, and such that were uploaded quite a while ago to different posts. I do not want them to be pre-filled and they are seemingly filled with random files.
It takes quite a while to load the "new post" page because of these pre-filled custom fields.
Prior to the move, I was able to write a new post quite rapidly and none of the custom fields used to be pre-filled.
If you can help, thank you!