Views Filter Page caching

Odd issue that just sprang up (maybe just sprang up) not sure.
Searching for customers using the POS User Selection View, and the first filtered search works fine. Subsequent searches will not be performed unless I reload the browser page. Same in Chrome or FF.
Now if I create a page, and use the page version, view's filters work as expected.
Not be smart enough to know how the pop-up window view is being handled by browser I'm not sure what I might have changed that created this issue.
Question: Is there a particular Drupal feature used for the pop-up windows that I might have changed?

Clearing drupal caches or reloading the browser window will clear it and it will start working.
I've tried adding a reset button, re-applying the search with no values to no avail.
Searches always work in views admin window. There are plenty of issues with views and caching but any patches I've found seem to be already in place.