Incorrect URL src on uploaded thumbnail images

{
  "formtabs":[
    {
      "MIGX_id":1,
      "caption":"Image",
      "fields":[
        {
          "field":"title",
          "caption":"Title",
          "MIGX_id":1
        },
        {
          "MIGX_id":2,
          "field":"image",
          "caption":"Image",
          "inputTV":"",
          "inputTVtype":"image",
          "configs":"",
          "sourceFrom":"migx",
          "sources":"",
          "inputOptionValues":"",
          "default":""
        },
        {
          "MIGX_id":3,
          "field":"description",
          "caption":"Description",
          "inputTV":"",
          "inputTVtype":"",
          "configs":"",
          "sourceFrom":"config",
          "sources":"",
          "inputOptionValues":"",
          "default":""
        }
      ]
    }
  ],
  "contextmenus":"update",
  "actionbuttons":"upload||loadfromsource",
  "columnbuttons":"",
  "filters":"[]",
  "extended":{
    "migx_add":"Add Image",
    "formcaption":"[[+pagetitle]] Images",
    "update_win_title":"Upload Images",
    "win_id":"resourcegallery",
    "maxRecords":"",
    "addNewItemAt":"bottom",
    "multiple_formtabs":"",
    "actionbuttonsperrow":4,
    "winbuttonslist":"cancel||done",
    "extrahandlers":"",
    "filtersperrow":4,
    "packageName":"",
    "classname":"",
    "task":"",
    "getlistsort":"",
    "getlistsortdir":"",
    "use_custom_prefix":"0",
    "prefix":"",
    "grid":"",
    "gridload_mode":2,
    "check_resid":1,
    "check_resid_TV":"",
    "join_alias":"",
    "has_jointable":"yes",
    "getlistwhere":"",
    "joins":"",
    "cmpmaincaption":"",
    "cmptabcaption":"",
    "cmptabdescription":"",
    "cmptabcontroller":"",
    "winbuttons":"",
    "onsubmitsuccess":"",
    "submitparams":""
  },
  "columns":[
    {
      "MIGX_id":1,
      "header":"ID",
      "dataIndex":"MIGX_id",
      "width":10,
      "renderer":"",
      "sortable":"false",
      "show_in_grid":1
    },
    {
      "MIGX_id":2,
      "header":"Title",
      "dataIndex":"title",
      "width":20,
      "sortable":"false",
      "show_in_grid":1,
      "renderer":"",
      "clickaction":"",
      "selectorconfig":"",
      "renderchunktpl":"",
      "renderoptions":"[]"
    },
    {
      "MIGX_id":3,
      "header":"Image",
      "dataIndex":"image",
      "width":20,
      "sortable":"false",
      "show_in_grid":1,
      "renderer":"this.renderImage",
      "clickaction":"",
      "selectorconfig":"",
      "renderchunktpl":"",
      "renderoptions":"[]"
    }
  ]
}