Url in cellTemplate causes 2 invalid get requests

[DenAnderson]

If I have
cellTemplate: '< div class="ui-grid-cell-contents">< img src="{{ COL_FIELD }}"/>< /div >'

I get these invalid get requests when the grid initialises:
GET https://127.0.0.1/%7B%7B%20grid.getCellValue(row,%20col)%20%7D%7D 404 (Not Found)
GET https://127.0.0.1/%7B%7B%20COL_FIELD%20%7D%7D 404 (Not Found)

Which causes havoc with our error stats.
Apart from that everything works fine and images are displayed correctly.
If I remove the img tag I can see that all my urls are correct:

cellTemplate: '< div class="ui-grid-cell-contents" >{{ COL_FIELD }}< /div >'