taskConvertUrls breaking nextgen editor for flex objects

Ive found out that this line:

`https://github.com/getgrav/grav-plugin-admin/blob/develop/classes/plugin/AdminController.php#L3020`

breaks the nextgen editor when trying to find out images to display. that exception triggers when using nextgen editor on a flex object (not a page), by commenting that line it seems to work fine so is the line necessary?