Were going to report it too but Kees made it first. [:blush:]
The Cloning button does in fact drops whatever filter you had in the product listing before pressing it. How to reproduce:
1. Admin Catalog > Product list: Filter by entering name or model id
2. Press the Clone button
3. See that your filter was dropped, and the list was reordered. Now you have to *re-enter* your filter (or 'Copy', as Lee suggested) to look it up again.
The problem with 'Copy' trick here is that it only finds you the new clone, while the folks out there (from own experience) are willing to witness 2 or more products (original filter) on the same page to be sure it worked correctly, and to edit/compare parameters. While this is a minor issue, the Cloning is popular thing, so keeping (not dropping) the filter could help make the cart even better experience for those of us frequently using the Cloning.