extra query string appended to end of XML URL

I’m attempting to implement the cu3er image slider. I’m running into an issue with the xml data file which I have generated by a snippet call. However, when the page renders, modx is appending a ?t="a long numeric number" to the end of the XML URL string. This doesn’t work because it isnt the path of the XML URL. Not sure what could be causing this appendage.

Please advise,

thanks,

J