I tried to explain everything in the image. Feel free to ask questions and I’ll answer them as best as I can. I’ve never had this problem before after almost 2 years of working with blueprint.
Here is better resolution: image.png - Google Drive
Edit: One thing I forgot to add: When I get the direct result of either the replace node or the get string from json node, both say the updated value, but after I try to set the value in the array, it did not.