list_folder results different from this morning

when performing an api call files_list_folder  with the path /Apps/YPDB2023 

up till this morning it would return the subfolder name and a list of all the files - but now I just get the subfolder name and a "has more" = true and a cursor - which I can then use to /files_list_folder/continue - and then I can see the files themselves..

To troubleshoot - I've bypassed my code and tried this directly on the API explorer and get the same thing - it's only in this folder - other folders behave as normal

dropbox.github.io/dropbox-api-v2-explorer/#files_list_folder

{
  "entries": [
    {
      ".tag": "folder",
      "name": "done",
      "path_lower": "/apps/ypdb2023/done",
      "path_display": "/Apps/YPDB2023/done",
      "id": "id:----"
    }
  ],
  "cursor": "---",
  "has_more": true
}

 and then using that cursor - via dropbox.github.io/dropbox-api-v2-explorer/#files_list_folder/continue

{
  "entries": [
    {
      ".tag": "file",
      "name": "10-10-2023 16-26-03.txt",
      "path_lower": "/apps/ypdb2023/10-10-2023 16-26-03.txt",
      "path_display": "/Apps/YPDB2023/10-10-2023 16-26-03.txt",
      "id": "------",
      "client_modified": "2023-10-10T15:26:03Z",
      "server_modified": "2023-10-10T15:26:05Z",
      "rev": "----",
      "size": 2981,
      "is_downloadable": true,
      "content_hash": "----"
    }
  ],
  "cursor": "----",
  "has_more": false
}

 if I create a test folder in the dropbox root and do the same calls it behaves as normal - 

{
  "entries": [
    {
      ".tag": "folder",
      "name": "test_subfolder",
      "path_lower": "/tester/test_subfolder",
      "path_display": "/tester/test_subfolder",
      "id": "id:-----"
    },
    {
      ".tag": "file",
      "name": "test file.txt",
      "path_lower": "/tester/test file.txt",
      "path_display": "/tester/test file.txt",
      "id": "id::-----",
      "client_modified": "2023-10-10T15:38:24Z",
      "server_modified": "2023-10-10T15:38:50Z",
      "rev": "----",
      "size": 4,
      "is_downloadable": true,
      "content_hash": "-----"
    }
  ],
  "cursor": "----",
  "has_more": false
}

very odd - 

thanks