Sorry we are unable to reproduce this here in XE2 and XE3, we have already investigated such issue and the latest version should have this issue fixed, are you using the latest version?
Yes, I had just downloaded the latest version, because on XE3 there was another, more evident, issue : I got an AV as soon as I pressed any key in the same circumstances described above, before the list could have a chance to pop out.
After installing the latest version of the FM pack the list popped out, but when I tried to select an item with the mouse, the AV happened.