JSON formatting affecting Tile view when pic is modified

Hello!

I am hoping someone can help with a random annoying JSON formatting issue I'm having!

I am using a SharePoint list with a Tile view. It's JSON formatted to fit the file thumbnail on the tile - all good so far (I believe anyway, JSON is not something I am overly familiar with!).

However, I've noticed when I modify the photo, the thumbnail ends up tiny on the tile and no amount of refreshing the screen changes it. Why is this?  How can I sort it?

See below, the pic on the left is the standard view size when the file is uploaded. The file on the right is post-modification (when it used to be the same size as the left picture and all I did was change it from a colour photo to B&W).

This is my JSON formatting on the view itself:

{
            "elmType": "div",
            "attributes": {
              "class": "sp-card-previewColumnContainer"
            },
            "children": [
              {
                "elmType": "div",
                "attributes": {
                  "class": "sp-card-imageContainer"
                },
                "style": {
                  "max-height": "260px",
                  "display": "flex",
                  "object-fit": "contain",
                  "justify-content": "center",
                  "align-items": "center"
                },
                "children": [
                  {
                    "elmType": "filepreview",
                    "attributes": {
                      "src": "@thumbnail.small"
                    },
                    "style": {
                      "max-height": "100%",
                      "max-width": "100%",
                      "display": "inline-block",
                      "object-fit": "contain"
                    },
                    "filePreviewProps": {
                      "fileTypeIconClass": "sp-fileTypeIcon-cardDesigner",
                      "brandTypeIconClass": "sp-brandTypeIcon-cardDesigner"
                    }
                  }
                ]
              }
            ]
          },