Hi Bruce and Martin,
I hope that everything is doing well.
We have noticed the case and saw that there might be an issue with the caching of query strings on static resources. Currently we cache all kind of static resources including their query strings/parameters, cachable artifacts and do not trim or remove anything from the original resource.
It is possible that we might have accidentally mislead you about this on chat.
If you might experience any such issues as in the current case then we might be able to help you out, debug it for you or work together to find a solution.
Thanks
Krasimir
WPX Hosting