Are you still looking for a solution? If so, I have a few things to try:
1. Try adding a refresh parameter to the embed code:
2. Does removing the cached selection cause another filter to become cached or is it only that specific filter?
3. Change Server cache settings to refresh more often.
Thanks much Diego,
I will try out the solutions you mentioned and let you know..
It is one specific filter out of several filters that is caching.
Thanks & Regards,